Software Engineer - Active SC, Java, MicroservicesUp to £550 per day (Inside IR35)London / Remote6 months My client is an instantly recognisable consultancy who require a strong Software Engineer with Active Security Clearance (SC) and with deep expertise in Java (Spring Boot) to join a large-scale, business‑critical microservices programme. Key Requirements: Proven experience working as a Java Software Engineer on large microservice architectures Active Security Clearance (SC) Strong capability building scalable RESTful APIs and backend services in Java (Spring Boot): Postgres (or other relational SQL databases) with solid understanding of schema design and SQL Docker: Confident containerising and deploying applications Test‑Driven Development (JUnit & Mockito or similar testing frameworks) CI/CD: Hands‑on experience with Jenkins or similar automated pipeline tooling Flexibility working in agile teams and collaborating closely with engineers, product, and design colleagues Nice to have: API Specification using Swagger / OpenAPI Gradle build systems Liquibase (or similar) for database versioning/migrations Kafka or similar event‑streaming platforms React and Typescript If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career. Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at (url removed)

Position: Java Tech Lead
Location: London, UK (Hybrid 2 days onsite a week)
Duration: Full Time

Job Description:
Key Responsibilities
? Design, develop, and maintain robust, scalable, and high-performance web applications.
? Build responsive and dynamic user interfaces using React.js.
? Develop Back End services and APIs using Java (Spring Boot/Spring Framework).
? Write clean, maintainable, and efficient code following best practices.
? Perform code reviews and mentor junior developers.
? Optimize applications for maximum speed and scalability.
? Ensure application security, performance, and reliability.
? Participate in Agile ceremonies such as sprint planning, stand-ups, and retrospectives.
? Troubleshoot and debug production issues.

Required Skills & Qualifications
? 8+ years of experience in full stack development.
? Strong proficiency in Java, React, Spring Boot, and Microservices Architecture.
? Mandatory hands-on experience with React.js, Redux (or similar state management libraries).
? Solid understanding of HTML5, CSS3, JavaScript (ES6+).
? Experience with RESTful API design and integration.
? Familiarity with databases such as MySQL, PostgreSQL, or MongoDB.
? Experience with version control systems like Git.
? Strong understanding of object-oriented programming and design patterns.
? Knowledge of containerization tools (Docker) and cloud platforms (AWS/Azure/GCP) is a plus.
? Experience with CI/CD pipelines.

Preferred Qualifications
? Experience with JAVAScript and React.
? Knowledge of Front End build tools.
? Familiarity with testing frameworks (JUnit, Mockito, Jest, etc.).
? Strong problem-solving and analytical skills.

Android Software Engineer (Kotlin) Cheltenham / Hybrid / Remote My client is looking for an experienced Android Software Engineer with strong Kotlin expertise to join a growing UK technology business delivering secure mobile solutions into the national defence sector. This is an opportunity to work across live programmes, next-generation product development, and cutting-edge proof-of-concept work, using modern Android engineering to solve complex real-world challenges. It would suit someone who wants to build secure, high-performance mobile applications in an environment where technical quality, innovation, and real-world impact genuinely matter. Benefits £70,000 - £85,000 basic salary Bonus Hybrid working and flexibility Pension Private healthcare Electric car scheme Training and development opportunities Friendly, knowledgeable, peer-sharing culture Career progression The role and responsibilities Designing, developing, testing, and maintaining high-quality Android applications Building secure, robust mobile applications in Kotlin Applying modern Android architecture patterns such as MVVM, MVI, and Clean Architecture Writing clean, maintainable code using modern Android practices including coroutines, Flow, and structured concurrency Integrating Android applications with REST APIs, backend services, and secure communications layers Supporting performance optimisation, battery efficiency, and memory usage improvements Participating in code reviews and helping drive engineering quality across the mobile estate Working closely with architects, backend engineers, cloud engineers, DevSecOps, and security specialists Contributing to secure mobile design decisions in line with modern security principles Supporting Agile delivery, technical discussions, and ongoing product improvement Key skills Strong commercial experience as an Android Software Engineer, Android Developer, or Mobile Developer Strong commercia l experience developing Android applications in Kotlin Good understanding of Android architecture patterns including MVVM, MVI, and/or Clean Architecture Experience integrating RESTful APIs Strong knowledge of Android build tooling including Gradle Experience with modern Android tooling and libraries Experience with automated testing such as JUnit, Mockito, and UI testing Familiarity with Git, CI/CD pipelines, and Agile software delivery Strong communication and collaboration skills British citizenship and ability to obtain MOD SC clearance Desired skills Existing SC clearance Experience working in defence, secure technology, or other highly regulated environments Knowledge of Mobile Device Management (MDM) platforms such as Microsoft Intune or VMware Workspace ONE Familiarity with Android Enterprise enrolment modes Exposure to secure mobile applications or operationally focused mobile technology Understanding of secure mobile / zero-trust principles Experience with gRPC and Protocol Buffers Knowledge of secure mobile standards or guidance Exposure to Kotlin Multiplatform Mobile (KMM) Please note: existing SC clearance is advantageous but not essential. Candidates must be British citizens and eligible to undergo MOD SC clearance If you would like more details about this position then please apply for the link. All the best, Charlie Syrett Richmond Square Consulting Ltd TPBN1\_UKTJ

Role Profile

The successful candidate for the Senior Lead Engineer role, will be working with the Director Technical Delivery Solution and Delivery, will form part of a team building a complex, ground-up cloud-based critical market infrastructure service in a bold new venture for LSEG. This opening requires a candidate who takes great pride in delivering excellence with excellent logical and technical skills and a can-do attitude combined with a helpful mentality, and a wish to play a critical role in forming and growing a new business.

Key Responsibilities

A strong focus on engineering excellence and coding, adopting an open and hands-on approach to problem-solving and delivery. Engage deeply in technical design and implementation to ensure solutions are robust, scalable, and aligned with industry standards. Actively contribute to all stages of the product engineering life cycle-solutioning, design, coding, and testing-while promoting collaboration and transparency within the team to drive high-quality outcomes.

Demonstrate ownership and pride in work, proactively taking on new responsibilities aligned with product engineering needs. Embrace and apply LSEG engineering principles, diving deep technically to build with purpose and foster excellence within the team through open collaboration. Create an environment of engagement, challenge, and constructive questioning, ensuring trust and respect are maintained and a strong one-team mentality is upheld

Key Skills and Experience

Event driven microservices architecture

• Strong understanding of microservices design, including pitfalls and best practices.
• Knowledge of Domain-Driven Design (DDD) and event-driven architecture principles.
• Experience with containerization and orchestration using Docker and Kubernetes.
• Skilled in event-driven patterns for efficient and robust communication.
• Expertise in building and maintaining DevOps pipelines, ideally with GitLab.
• Proficient in shift-left testing using tools like JUnit, Cucumber, Gherkin, PACT, and Test Containers.
• Working knowledge of event/message brokers such as Kafka and MQ.

Advanced Java

• Strong experience in Object-Oriented Programming (OOP).
• Advanced knowledge of Java 17+ features and practical experience with Spring Boot.
• Skilled in developing RESTful services, including REST design principles, Swagger/OpenAPI, and Spring REST MVC.
• Proficient in building and delivering enterprise-grade Java applications.
• Hands-on experience with data structures, algorithms, concurrency, and multi-threading.

Database Management

• Strong SQL knowledge with experience in relational databases such as Postgres.
• Working knowledge of object storage solutions, e.g., AWS S3.
• Familiarity with database version control tools like Flyway and Liquibase.

Cloud Architecture

• Experience working with major public cloud platforms, preferably AWS.
• Hands-on use of cloud-based services such as AWS Aurora, MSK, S3, and IAM.
• Basic understanding of cloud networking concepts.

Blockchain Integration and Interoperability

• Understanding of blockchain fundamentals, including consensus mechanisms and smart contracts.
• Knowledge of interoperability protocols
• Experience integrating blockchain solutions with existing enterprise systems.
• Familiarity with cross-chain communication and bridging technologies.
• Awareness of security considerations in blockchain integration (e.g., cryptographic standards, key management).
• Knowledge of token standard and transaction lifecycle.

Agile Ways of Working

• Strong understanding and commitment to the ethos of agile working.
• Experience working within Scrum and Kanban frameworks.
• Active participation in sprint ceremonies, including Product Backlog Refinement.
• Proven collaboration with cross-functional teams in scaled agile environments.

Key Behaviours

• Delivery-focused: Committed to meeting deadlines and managing stakeholder expectations.
• Accountable: Takes ownership and responsibility for outcomes.
• Collaborative: Works effectively within cross-functional teams and fosters teamwork.
• Communicative: Champions clear, respectful, and constructive communication.
• Quality-driven: Maintains high standards in code quality, testing, and CI/CD practices.
• Adaptable & Innovative: Eager to learn, improve, and embrace new technologies.
• Critical yet Respectful: Challenges ideas constructively while maintaining professionalism.
• Engineering Mindset: Passionate about solving problems and minimizing complexity.

Career Stage:
Manager

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you’re ready to take your career to the next level and make a significant impact, we’d love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

We are seeking an experienced and highly motivated Lead Full Stack Developer to join our dynamic engineering team. The ideal candidate will possess deep expertise in Java and ReactJS, coupled with a strong understanding of both relational (RDBMS) and NoSQL databases. This role is critical for driving the design, development, and deployment of robust, scalable, and high-performance applications. The Lead Developer will also play a key role in advocating for and implementing best practices in CI/CD application delivery and will have the opportunity to explore and integrate AI technologies into our solutions.

Key Responsibilities

• Lead the design, development, and implementation of complex enterprise-level applications using Java for backend services and ReactJS for intuitive and responsive front-end user interfaces.
• Architect and manage data storage solutions, demonstrating proficiency with relational databases (e.g. Oracle, MySQL) and NoSQL databases (e.g., MongoDB, Cassandra, DynamoDB). This includes schema design, query optimization, and data migration strategies.
• Drive continuous improvement in our CI/CD pipelines, ensuring efficient, automated, and reliable application delivery from development to production environments.
• Mentor and provide technical guidance to junior and mid-level developers, fostering a culture of collaboration, excellence, and continuous learning.
• Collaborate with product managers, UX/UI designers, and other stakeholders to translate business requirements into technical specifications and deliver innovative solutions.
• Conduct code reviews, ensuring adherence to coding standards, performance, security, and scalability best practices.
• Troubleshoot and resolve complex technical issues across the full application stack.
• Stay abreast of emerging technologies, industry trends, and best practices in full-stack development, database management, CI/CD, and Artificial Intelligence.

Required Qualifications

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field.
• Professional experience in software development, with at least 3 years in a lead or senior full-stack role.
• Strong proficiency in Java development, including Spring Boot, Spring Framework, and related ecosystem.
• Expert-level skills in ReactJS and its core principles, along with experience in popular React workflows (such as Flux or Redux) and component libraries.
• Demonstrable experience with RDBMS (e.g., PostgreSQL, Oracle, MySQL), including advanced SQL, schema design, and performance tuning.
• Solid understanding and hands-on experience with NoSQL databases (e.g., MongoDB, Cassandra, DynamoDB), including data modeling and query optimization for these systems.
• Proven experience with CI/CD application delivery management, including tools like Jenkins, GitLab CI, GitHub Actions, Azure DevOps, or similar.
• Experience with cloud platforms (e.g., AWS, Azure, GCP) and containerization technologies (e.g., Docker, Kubernetes).
• Excellent problem-solving, analytical, and communication skills.
• Ability to work effectively in an agile development environment.

Preferred Qualifications

• Exposure to Artificial Intelligence (AI) and Machine Learning (ML) concepts, frameworks (e.g., TensorFlow, PyTorch), or practical application of AI in software solutions.
• Experience with message brokers (e.g., Kafka, RabbitMQ) and microservices architecture.
• Familiarity with testing frameworks (e.g., JUnit, Mockito, Jest, React Testing Library).
• Experience with GraphQL.

What we’ll provide you
By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• 27 days annual leave (plus bank holidays)
• A discretional annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends
• Access to an array of learning and development resources

Visit ourGlobal Benefitspage to learn more.
Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.

Job Family Group:
Technology ------------------------------------------------------
Job Family:
Applications Development ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi .

View Citi’s EEO Policy Statement and the Know Your Rights poster.

Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

We are looking for a skilled Java Developer to join our engineering team. The ideal candidate will be responsible for designing, developing, and maintaining high-performance, scalable, and resilient applications using modern Java technologies. This role requires strong technical expertise, a passion for problem-solving, and the ability to contribute significantly to our product development lifecycle, from concept to deployment. The Senior Java Developer will also mentor junior team members and contribute to architectural discussions.

Key Responsibilities

• Design, develop, and maintain robust, scalable, and high-performance backend applications and services using Java and the Spring ecosystem (Spring Boot, Spring Framework).
• Write clean, efficient, well-documented, and testable code following best practices and design patterns.
• Collaborate with product owners, architects, and other developers to understand requirements, define technical specifications, and deliver innovative solutions.
• Participate in all phases of the software development lifecycle, including analysis, design, development, testing, deployment, and support.
• Optimize application performance, identify bottlenecks, and implement solutions to ensure high availability and responsiveness.
• Conduct code reviews, provide constructive feedback, and ensure adherence to coding standards and architectural guidelines.
• Troubleshoot and debug complex issues in development and production environments.
• Mentor junior developers, share knowledge, and contribute to a culture of continuous learning and improvement.
• Stay up-to-date with emerging technologies, industry trends, and best practices in Java development and software engineering.

Required Qualifications

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related technical field.
• Professional experience in Java development.
• Strong expertise in Core Java, including multithreading, data structures, algorithms, and object-oriented design principles.
• Extensive experience with Spring Framework and Spring Boot for building microservices and RESTful APIs.
• Solid understanding and hands-on experience with relational databases (e.g., PostgreSQL, Oracle, MySQL, SQL Server), including advanced SQL, schema design, and ORM frameworks (e.g., Hibernate, JPA).
• Experience with building and consuming RESTful web services.
• Proficiency with build tools such as Maven or Gradle.
• Experience with version control systems, particularly Git.
• Familiarity with Agile development methodologies (Scrum, Kanban).
• Strong problem-solving skills, attention to detail, and ability to work independently and as part of a team.
• Excellent communication skills, both written and verbal.

Preferred Qualifications

• Experience with NoSQL databases (e.g., MongoDB, Cassandra, Redis).
• Familiarity with cloud platforms (e.g., AWS, Azure, GCP) and containerization technologies (e.g., Docker, Kubernetes).
• Experience with message brokers (e.g., Kafka, RabbitMQ).
• Knowledge of testing frameworks (e.g., JUnit, Mockito) and experience with Test-Driven Development (TDD).
• Understanding of CI/CD pipelines and tools (e.g., Jenkins, GitLab CI, GitHub Actions).
• Experience with performance tuning and optimization of Java applications.
• Familiarity with front-end technologies (e.g., JavaScript, React, Angular) is a plus, but not required for this backend-focused role.

What we’ll provide you
By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• 27 days annual leave (plus bank holidays)
• A discretional annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends
• Access to an array of learning and development resources

Job Family Group:
Technology ------------------------------------------------------
Job Family:
Applications Development ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi .

View Citi’s EEO Policy Statement and the Know Your Rights poster.

Active SC clearance required
Inside IR35
Location: Remote UK

Role Overview
We are seeking a skilled SC Cleared Java Developer to join our team. The ideal candidate will have a strong background in software development, specifically in Java and related technologies. You will be responsible for designing, developing, and maintaining robust applications that meet our business needs while collaborating with cross-functional teams in an agile environment.

Responsibilities

• Develop and maintain high-quality Java applications using Spring Boot.
• Design and manage databases, preferably using Postgres or other relational SQL databases.
• Utilise Docker for containerization and deployment of applications.
• Implement test-driven development practises using Junit, Mockito, or similar testing libraries.
• Participate in CI/CD processes using Jenkins or similar pipeline tooling to ensure smooth integration and deployment.
• Work collaboratively within agile teams, contributing to discussions and decision-making processes.
• Collaborate with colleagues from various disciplines to deliver comprehensive solutions.

Qualifications
Essential Skills/Experience:

• Proficiency in Java, particularly with Spring Boot framework.
• Experience with Postgres or other relational SQL databases.
• Familiarity with Docker for application deployment.
• Strong understanding of test-driven development and experience with Junit and Mockito or similar libraries.
• Experience with CI/CD practises, particularly using Jenkins or similar tools.
• Ability to work effectively in agile teams and collaborate with cross-functional colleagues.

Desirable Skills:

• Knowledge of API Specification using Swagger OpenAPI.
• Experience with Gradle for project management.
• Familiarity with Liquibase for database version control.
• Understanding of Kafka for messaging services.
• Experience with front-end technologies such as React and Typescript.

Position Description

We are looking for a Head of Development to work within the front office development team that will work on its trading platforms. Examples of projects include building high-capacity OMS, low latency EMS platform and market connectivity. This is a rare opportunity to work on engineering an end-to-end in-house built platform supporting global front office business. The ideal candidate would be motivated by leveraging cutting-edge high throughput, low latency technologies to resolve challenges in trading platforms. In effect, someone who will find the correct solution to an engineering problem when left on their own because they like to solve problems well. Domain knowledge on OMS/ EMS/ Market Connectivity is. At the same time, they should work well in teams, as a contributor and/or leader. Communication and clarity are critical, as decisions made will have long lasting and significant effects on a critical global initiative, therefore they need to be convincing and recorded so they can be reviewed with hindsight and learned from.

Key Areas of Responsibilities

• Take a leading role in defining all application development initiatives within the EMEA region’s Execution Services domain.
• Maintain a forward-looking perspective on technological advancements and explore ways to strategically leverage them where beneficial.
• Apply a pragmatic approach to technology, integrating it effectively into the development roadmap — focusing on reusability and eliminating unnecessary complexity.
• Demonstrate strong presentation skills to articulate and advocate for innovative technology solutions, designs, frameworks, and architectural concepts.
• Possess the ability to synthesize and interpret complex architectural and design analysis, ensuring cohesive understanding across teams.
• Initiate, execute, and facilitate knowledge transfer for technology projects, ensuring smooth project kickoff and delivery.
• Mentor development teams on technological best practices, review technical solutions, and support the delivery of Non-Functional Requirements (NFRs).
• Monitor and manage technical debt, conduct application audits, and serve as a gatekeeper for the adoption of new technologies.
• Design and develop high-quality, cutting-edge front-office systems for Equities Trading.
• Lead a team in managing business change requests and implementing continuous technical improvements.
• Drive initiatives related to technical design and architecture, emphasizing scalability, stability, and performance.
• Provide guidance, mentorship, and support to junior team members, fostering a collaborative and growth-oriented environment.
• Deliver Level 3 support for Cash Equities trading operations, ensuring stability and incident resolution.
• Collaborate with front-office development teams to align on design interfaces and interrelated functionalities.
• Conduct unit testing and functional validation of developed code to ensure quality standards.
• Lead and coordinate efforts with Quality Assurance analysts to guarantee rigorous testing and validation.
• Ensure the timely delivery of high-quality software solutions aligned with business needs.
• Maintain full compliance with CLSA training programs and regulatory requirements for yourself and your team.

Requirements

• Bachelor’s degree in Computer Science, Software Engineering, or a related IT field.
• 10-15 years of extensive software development experience.
• Strong proficiency in Java—class creation, JVM internals, garbage collection—with certifications preferred.
• Proficiency in SQL (Oracle, MS SQL, PostgreSQL), including stored procedures; certifications preferred.
• Expertise in Linux command-line scripting (bash) and system administration.
• Hands-on experience developing low-latency, high-throughput Java components.
• Practical experience building cash equity trading platforms—OMS, EMS, Market Connectivity, Risk, GUI, Middleware, Middle Office.
• Deep understanding of fundamental computer science concepts.
• Experience with distributed caching technologies (GigaSpaces, Ignite, Coherence).
• Full-stack skills in Core Java and REST APIs.
• Practical knowledge of multi-threading, event-driven programming, and memory optimization.
• Strong problem-solving and analytical abilities.
• Knowledge of performance tuning techniques.
• Familiarity with enterprise SDLC tools like JIRA and Confluence.
• Experience with CI/CD tools such as Git, Maven/Gradle, Jenkins/Bamboo, GitLab.
• Shell scripting and Unix/Linux fundamentals.
• Understanding of schemas, JMX, JUnit, XML, and IDEs (Eclipse, IntelliJ).
• Ability to work under tight deadlines in fast-paced environments with minimal supervision.
• Proven leadership and influencing skills to drive technical initiatives.
• Motivated, eager to learn and share knowledge
• Excellent command of / fluent in both spoken and written English.

ABOUT US:

LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services - and our open-access model - we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.

LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific. LSEG’s ticker symbol is LSEG.

OUR POEPLE:

People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape how we think, how we do things and how we help our people fulfil their potential. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference. Our workplace generates an enriching and rewarding experience for our people and customers alike. Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential.

We know that real personal growth cannot be achieved by simply climbing a career ladder - which is why we encourage and enable a wealth of avenues and interesting opportunities for everyone to broaden and deepen their skills and expertise. As a global organisation spanning 70 countries and one rooted in a culture of growth, opportunity, diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with meaningful careers!!

ROLE SUMMARY:

As a Software Development Engineer in Test/Quality Engineer, you will work closely with developers and other specialists to build effective testing solutions and ensure quality is embedded throughout the development lifecycle.

You will:

• Contribute to automated testing for Java microservices and Python AWS Lambda functions
• Collaborate with developers to strengthen unit, component, and contract testing practices
• Support the implementation of a microservices testing strategy covering unit, component, contract, and maintainable end-to-end testing approaches
• Help create component tests using Podman and Dev Containers to reduce integration issues and keep pipelines clean within a trunk-based development environment
• Support integration testing between Java services and AWS Lambda functions
• Participate in Agile/Scrum ceremonies, contributing to refinement sessions and helping improve user stories and acceptance criteria
• Encourage quality-focused practices such as BDD (3 Amigos, Gherkin/Cucumber)
• Work with other teams to share good testing approaches and contribute to continuous improvement of frameworks and pipelines

WHAT YOU’LL BE DOING:

Build and maintain automated tests using:

• Java (JUnit, Rest-Assured)
• Pact for contract testing
• UI tools such as Selenium, Cypress, or Playwright (where relevant)
• Integrate automated tests into CI/CD pipelines supporting trunk-based development
• Encourage smaller, high-quality merge requests and regular releases
• Participate in refinement, planning, and quality-focused Agile ceremonies
• Explore and recommend tools and approaches that improve test coverage, reliability, and developer experience

WHAT YOU’LL BRING:

• Strong experience in Java development and test automation
• Understanding of microservices testing strategies (unit, component, contract, and E2E)
• Solid exposure to the AWS platform
• Experience working in Agile/Scrum environments
• Familiarity with CI/CD pipelines and trunk-based development practices
• A passion for continuous learning and collaborative ways of working
• Good communication skills for working with developers and wider engineering teams
• Containers & orchestration: experience with Docker, EKS
• Infrastructure as Code: awareness of Terraform, CloudFormation
• Advanced testing tools: Pact, Rest-Assured, Mockito, Localstack
• Observability: Exposure to distributed tracing and monitoring for microservices

Career Stage:
Senior Associate

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you’re ready to take your career to the next level and make a significant impact, we’d love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

ABOUT US:

LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services - and our open-access model - we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.

LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific. LSEG’s ticker symbol is LSEG.

OUR PEOPLE:

People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape how we think, how we do things and how we help our people fulfil their potential. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference. Our workplace generates an enriching and rewarding experience for our people and customers alike. Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential.

We know that real personal growth cannot be achieved by simply climbing a career ladder - which is why we encourage and enable a wealth of avenues and interesting opportunities for everyone to broaden and deepen their skills and expertise. As a global organisation spanning 70 countries and one rooted in a culture of growth, opportunity, diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with meaningful careers!!

ROLE SUMMARY:

As a Senior Quality Engineer, you will join a central Quality Enablement team, where you’ll define standards for automated testing across our Java microservices and Python-based AWS Lambda functions.

You will:

• Enable teams to maintain a robust microservices testing strategy, covering unit, component, contract, and simple, maintainable end-to-end tests
• Support engineers in running containerised services locally (e.g., Podman, Dev Containers) to reduce integration issues and keep pipelines reliable within a trunk-based development workflow
• Collaborate closely with developers, analysts, and fellow engineers to embed quality early, continuously improve frameworks, and enhance CI/CD pipelines

WHAT YOU’LL BE DOING:

Build and maintain automated tests using:

• Java (JUnit, Rest-Assured)
• Pact for contract testing
• Sometimes tools like Selenium, Cypress, and Playwright for UI testing (where applicable)
• Integrate tests into CI/CD pipelines to support trunk-based development
• Explore new tools and approaches to improve coverage and reliability

WHAT YOU’LL BRING:

• Strong experience in Java development and test automation
• Knowledge of microservices testing strategies
• AWS platform knowledge, including Lambda (for integration), API Gateway, S3, CloudWatch, and IAM
• Familiarity with CI/CD pipelines and trunk-based development
• Strong communication skills and a passion for continuous learning
• Experience of performance testing large distributed applications
• Exposure to containerization & Orchestration: Docker, Kubernetes, EKS
• Infrastructure as Code: Terraform, CloudFormation
• Service Resilience: Exposure to test strategies like fault injection, resiliency measures such as circuit breakers or networking layers like service mesh
• Advanced testing tools: Pact, Rest-Assured, Mockito, Localstack
• Observability: Distributed tracing and monitoring in microservices

Career Stage:
Senior Associate

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you’re ready to take your career to the next level and make a significant impact, we’d love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

Role Profile

The Senior lead Scala Engineer will play a key role in the engineering and delivery of a critical market-infrastructure service within the Equities platform, with a strong focus on AWS cloud-native development. Reporting directly to the Senior Technical Delivery Engineer, Post Trade, the successful candidate will be responsible for designing, implementing, and maintaining performant, resilient, and scalable backend services built predominantly in Scala.

As a senior member of the engineering team, this individual will help shape technical direction, contribute to best-in-class engineering standards, and actively support the continued growth and evolution of the business.

This exciting opportunity requires a candidate to take Pride in their work and Ownership of their work. Have excellent engineering skills, communication skills, can-do behaviour and highly collaborative. Always positively encouraging the team.

Key Responsibilities

A strong focus on engineering excellence and coding, adopting an open and hands-on approach to problem-solving and delivery. Engage deeply in technical design and implementation to ensure solutions are robust, scalable, and aligned with industry best practices. Actively contribute to all stages of the product engineering life cycle-solutioning, design, coding, and testing-while promoting collaboration and transparency within the team to drive high-quality outcomes.

Demonstrate ownership and pride in work, proactively taking on new responsibilities aligned with product engineering needs. Embrace and apply LSEG engineering principles, diving deep technically to build with purpose and foster excellence within the team through open collaboration. Create an environment of engagement, challenge, and constructive questioning, ensuring trust and respect are maintained and a strong one-team mentality is upheld

Key Skills and Experience

Event driven microservices architecture

• Strong understanding of microservices design, including pitfalls and best practices.
• Knowledge of Domain-Driven Design (DDD) and event-driven architecture principles.
• Experience with containerization and orchestration using Docker and Kubernetes.
• Skilled in event-driven patterns for efficient and robust communication.
• Expertise in building and maintaining DevOps pipelines, ideally with GitLab.
• Proficient in shift-left testing using tools like JUnit, Cucumber, Gherkin, PACT, and Test Containers.
• Working knowledge of event/message brokers such as Kafka and MQ.

Advanced Scala programming

• Strong proficiency in both functional and object-oriented programming paradigms , with the ability to apply the right approach to deliver robust, maintainable solutions.
• Deep practical expertise with Scala, including key frameworks and libraries such as:
• Akka - for building concurrent, distributed, and resilient message-driven systems.
• Play Framework - for developing scalable, high-performance web applications.
• Cats / Scalaz - for implementing advanced functional programming abstractions and patterns.
• Proven experience delivering enterprise-grade Scala applications in production environments, with a focus on quality, resilience, performance, and observability.
• Strong understanding of data structures, algorithms, concurrency, and multi-threading, with the ability to design efficient and scalable solutions for high-throughput systems.

Database Management

• Strong SQL knowledge with experience in relational databases such as Postgres.
• Working knowledge of object storage solutions, e.g., AWS S3.
• Familiarity with database version control tools like Flyway and Liquibase.
• Cloud Architecture
• Experience working with major public cloud platforms, preferably AWS.
• Hands-on use of cloud-based services such as AWS Aurora, MSK, S3, and IAM.
• Basic understanding of cloud networking concepts.

Agile Ways of Working

• Strong understanding and commitment to the ethos of agile working.
• Experience working within Scrum and Kanban frameworks.
• Active participation in sprint ceremonies, including Product Backlog Refinement.
• Proven collaboration with cross-functional teams in scaled agile environments.
• You have some experience of writing applications using Java.
• You have developed Web applications using ReactJS.

Career Stage:
Manager

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you’re ready to take your career to the next level and make a significant impact, we’d love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

The Mid-level Java Developer will be an integral part of the Data Security Identity Innovation space within the Cloud Technology Service department. This intermediate-level position is responsible for the design, development, and implementation of robust microservice applications. The primary objective is to build solutions, predominantly using Java and Spring Boot, that drive automation and achieve cost reductions by streamlining manual processes across the firm. The successful candidate will ensure high-quality standards are met within existing and planned technology frameworks, contributing to the strategic evolution of our cloud-based identity services.

Responsibilities

• Develop, deploy, and maintain microservice applications primarily using Java and Spring Boot, and occasionally Python, focusing on automation and cost reduction initiatives.
• Contribute to the technical design, development, and testing of new features and functionalities within the identity innovation space.
• Collaborate with business and development teams to translate engineering requirements into technical specifications and assist in defining application and system processes.
• Ensure the seamless integration of microservices with existing systems and cloud infrastructure.
• Implement solutions and processes in accordance with audit initiatives and requirements, consulting with Business Information Security Officers (BISOs) and Technology Information Security Officers (TISOs) as needed.
• Exhibit an in-depth understanding of Java development best practices, microservices architecture, and cloud-native principles.
• Participate in code reviews, mentor junior team members, and contribute to continuous improvement of development processes.
• Appropriately assess risk when making technical decisions, demonstrating particular consideration for the firm’s reputation and safeguarding Citigroup, its clients, and assets, by driving compliance with applicable laws, rules, and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct, and business practices, and escalating, managing, and reporting control issues with transparency.

Qualifications

• Proven relevant experience in software development, with a strong focus on Java and microservices.
• Demonstrated experience working in a large, complex, and/or global environment, preferably within Financial Services.
• Proven ability to manage technical projects or significant project components effectively.
• Consistently demonstrates clear and concise written and verbal communication skills, especially in technical contexts.
• Comprehensive understanding of software design principles, development methodologies, and analytics tools to identify best practices.
• Demonstrated analytic and diagnostic skills for troubleshooting and problem-solving.
• Ability to work effectively in a matrix environment and partner with virtual teams.
• Ability to work independently, prioritize tasks, and take ownership of various parts of a project or initiative from conception to deployment.
• Ability to work under pressure and manage tight deadlines or unexpected changes in expectations or requirements in a fast-paced development environment.
• Proven track record of contributing to operational process change and improvement through technical solutions.

Education

• Bachelor’s degree/University degree in Computer Science, Engineering, or a related field, or equivalent experience.

Must-Have Skills

• Programming Languages: Core Java
• Frameworks: Spring Framework (Core, Spring Security, Spring Data)
• Databases Relational: Oracle, PostgreSQL
• Databases NoSQL: MongoDB
• Web Services: SOAP and RESTful API development
• Build Tools: Maven, Gradle
• Version Control: Git
• Testing Frameworks: JUnit, AssertJ, Mockito, Cucumber
• Logging: Experience with logging frameworks (e.g., SLF4J, Log4j)
• Containerization: Docker, Kubernetes
• Message Queues: Kafka
• Architecture: Microservices Architecture
• DevOps: CI/CD pipelines and practices

Nice-to-Have Skills

• Programming Languages: Basic knowledge and experience with Python
• Performance Tuning: Basic knowledge of JVM tuning and application profiling

What we’ll provide you
By joining Citi Belfast, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• 27 days annual leave (plus bank holidays)
• A discretional annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends
• Access to an array of learning and development resources

Visit ourGlobal Benefitspage to learn more.
Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.

Job Family Group:
Technology ------------------------------------------------------
Job Family:
Systems & Engineering ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi .

View Citi’s EEO Policy Statement and the Know Your Rights poster.

Role Profile

The successful candidate for the Engineer, Post Trade role, will be working with the Director Technical Delivery Solution and Delivery, will form part of a team building a complex, ground-up cloud-based critical market infrastructure service in a bold new venture for LSEG. This opening requires a candidate who takes great pride in delivering excellence with excellent logical and technical skills and a can-do attitude combined with a helpful mentality, and a wish to play a critical role in forming and growing a new business.

Key Responsibilities

A strong focus on engineering excellence and coding, adopting an open and hands-on approach to problem-solving and delivery. Engage deeply in technical design and implementation to ensure solutions are robust, scalable, and aligned with industry standards. Actively contribute to all stages of the product engineering life cycle-solutioning, design, coding, and testing-while promoting collaboration and transparency within the team to drive high-quality outcomes.

Demonstrate ownership and pride in work, proactively taking on new responsibilities aligned with product engineering needs. Embrace and apply LSEG engineering principles, diving deep technically to build with purpose and foster excellence within the team through open collaboration. Create an environment of engagement, challenge, and constructive questioning, ensuring trust and respect are maintained and a strong one-team mentality is upheld

Key Skills and Experience

Event driven microservices architecture

• Strong understanding of microservices design, including pitfalls and best practices.
• Knowledge of Domain-Driven Design (DDD) and event-driven architecture principles.
• Experience with containerization and orchestration using Docker and Kubernetes.
• Skilled in event-driven patterns for efficient and robust communication.
• Expertise in building and maintaining DevOps pipelines, ideally with GitLab.
• Proficient in shift-left testing using tools like JUnit, Cucumber, Gherkin, PACT, and Test Containers.
• Working knowledge of event/message brokers such as Kafka and MQ.

Advanced Java

• Strong experience in Object-Oriented Programming (OOP).
• Advanced knowledge of Java 17+ features and practical experience with Spring Boot.
• Skilled in developing RESTful services, including REST design principles, Swagger/OpenAPI, and Spring REST MVC.
• Proficient in building and delivering enterprise-grade Java applications.
• Hands-on experience with data structures, algorithms, concurrency, and multi-threading.

Database Management

• Strong SQL knowledge with experience in relational databases such as Postgres.
• Working knowledge of object storage solutions, e.g., AWS S3.
• Familiarity with database version control tools like Flyway and Liquibase.

Cloud Architecture

• Experience working with major public cloud platforms, preferably AWS.
• Hands-on use of cloud-based services such as AWS Aurora, MSK, S3, and IAM.
• Basic understanding of cloud networking concepts.

Blockchain Integration and Interoperability

• Understanding of blockchain fundamentals, including consensus mechanisms and smart contracts.
• Knowledge of interoperability protocols
• Experience integrating blockchain solutions with existing enterprise systems.
• Familiarity with cross-chain communication and bridging technologies.
• Awareness of security considerations in blockchain integration (e.g., cryptographic standards, key management).
• Knowledge of token standard and transaction lifecycle.

Agile Ways of Working

• Strong understanding and commitment to the ethos of agile working.
• Experience working within Scrum and Kanban frameworks.
• Active participation in sprint ceremonies, including Product Backlog Refinement.
• Proven collaboration with cross-functional teams in scaled agile environments.

Key Behaviours

• Delivery-focused: Committed to meeting deadlines and managing stakeholder expectations.
• Accountable: Takes ownership and responsibility for outcomes.
• Collaborative: Works effectively within cross-functional teams and fosters teamwork.
• Communicative: Champions clear, respectful, and constructive communication.
• Quality-driven: Maintains high standards in code quality, testing, and CI/CD practices.
• Adaptable & Innovative: Eager to learn, improve, and embrace new technologies.
• Critical yet Respectful: Challenges ideas constructively while maintaining professionalism.
• Engineering Mindset: Passionate about solving problems and minimizing complexity.

Career Stage:
Senior Associate

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you’re ready to take your career to the next level and make a significant impact, we’d love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
26950897 Lead Application Developer - VP - XVA Technology

What would a candidate search for?
Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

What We do /The Team
XVA Technology at Citi is undertaking a bold, multi-year transformation to build a best-in-class centralised cross asset platform risk system. We are re-engineering our technology estate to achieve world-leading performance and resiliency, enabling new capabilities. Our ambition is to deliver a seamlessly integrated, highly automated platform that drives outstanding client outcomes and accelerates growth across our global franchise. As part of the team, you’ll collaborate closely with high-calibre engineers and deeply engaged business and product partners - working together to define and deliver the next generation of XVA technology at Citi.

Role Overview/What will you do:
As an Applications Development Technology Lead Analyst, you will be instrumental in shaping the future of our product quality and delivery, working towards a target state of a fully automated platform with minimal manual QA intervention. This role combines strategic vision with rigorous quality assurance expertise, with a strong emphasis on driving value through automation, particularly in the realm of Generative AI.

• Lead application systems analysis and programming activities, ensuring application design adheres to the overall architecture blueprint.
• Drive product quality and delivery through automation initiatives, especially in generative AI, targeting a fully automated platform with minimal manual QA intervention.
• Partner with management teams to define necessary system enhancements, deploy new products, and resolve high-impact problems through in-depth evaluation of complex business processes.
• Collaborate with development teams and Product Owners to formulate comprehensive requirements and propose innovative, efficient solutions.
• Define and drive the strategy for quality automation, overseeing testing priorities, roadmapping for releases, and continuous improvement.
• Act as a central point of contact for interdepartmental communication, ensuring alignment and seamless collaboration across various project impacts.
• Provide technical expertise, mentor mid-level developers and analysts, and establish standards for coding, testing, debugging, and implementation.
• Proactively assess risk, ensure compliance with laws and regulations, and maintain clear, concise communication across all organizational levels.

Key Skills and Experience required

• Bachelor’s degree in Computer Science, Engineering, or a related field (Master’s degree preferred).
• Proven relevant experience in Applications Development, systems analysis, or a similar tech lead role.
• Proven experience in product ownership, quality assurance management, or a hybrid role within a technology-driven environment.
• Extensive experience with system analysis, software application programming, and managing successful projects.
• Strong understanding of the Software Development Lifecycle (SDLC) and various testing methodologies, with experience driving automation initiatives.
• Demonstrated leadership, project management, and Subject Matter Expertise in at least one area of Applications Development.
• Excellent written, verbal, and interpersonal communication skills, ensuring effective dissemination of information.

Any Beneficial / Nice to have skills and experience

• Practical experience with Automation Testing frameworks and tools.

• Experience with Generative AI (Gen AI) concepts and their application in product development or quality assurance.

• Familiarity with AI-powered development tools such as Copilot.

• Proficiency in modern testing frameworks and tools like Playwright, Selenium, and JUnit.

• Strong analytical and problem-solving abilities, with an ability to adjust priorities quickly.

• Experience working in an Agile/Scrum development environment.

• Ability to think strategically and translate vision into actionable plans.

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

What we’ll provide you
By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• 27 days annual leave (plus bank holidays)
• A discretional annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends
• Access to an array of learning and development resources

Visit our About Us | Culture, Values & Benefits page to learn more.
Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.

Job Family Group:
Technology ------------------------------------------------------
Job Family:
Applications Development ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi .

View Citi’s EEO Policy Statement and the Know Your Rights poster.

Join Our Leading Banking Giant as an Application Tester!Location: London 3 days per weekRate: 416 Per Day UmbrellaDuration: 6 Months minimum

Are you passionate about quality assurance? Do you have a knack for ensuring applications run smoothly and efficiently? If so, we have an exciting opportunity for you! We are on the lookout for a skilled Application Tester to join our innovative team and help us elevate our software to new heights.

What You’ll Do:

As our Application Tester, you’ll play a crucial role in ensuring the quality and reliability of our applications. Your responsibilities will include:

• Designing and Executing Tests: Develop detailed test plans and execute comprehensive test cases to ensure optimal application functionality.
• Identifying Bugs: Detect, document, and track defects, working closely with developers to prioritise and resolve issues.
• Automating Tests: Implement automation strategies to enhance testing efficiency and effectiveness.
• Collaborating with Teams: Work cross-functionally with product managers, developers, and other stakeholders to provide feedback and insights on application performance.
• Mentoring and Leadership: Guide junior testers, share knowledge, and foster a culture of quality within the team.

What We’re Looking For:

• Extensive testing experience in application testing, with a strong understanding of testing methodologies and best practices.
• Proven experience in testing tools and automation frameworks (e.g., Selenium, JUnit, etc.).
• Leadership Abilities: Proven experience leading teams and mentoring junior testers.
• Communication Skills: Excellent verbal and written communication skills to collaborate effectively with various teams.
• A Positive Attitude: A cheerful and professional demeanor that contributes to a fun and productive work environment.
• Ideally you will have some coding experience (C# or .NET would be beneficial)

Ready to Make an Impact?

If you’re excited to take on new challenges and contribute to a team that values innovation and quality, we want to hear from you!

Adecco is a disability-confident employer. It is important to us that we run an inclusive and accessible recruitment process to support candidates of all backgrounds and all abilities to apply. Adecco is committed to building a supportive environment for you to explore the next steps in your career. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

Job Description:

The programme represents the next generation of the UKs biometric capability replacing and integrating with legacy systems and other government departments As a Java L3 resource you will be responsible for triaging and resoling production issues on priority and solving complex technical support challenges, troubleshooting, debugging and relaying relevant product issues and bugs to the delivery team.

The role requires in-depth understanding of the software development lifecycle and strong technical experience with an open-minded attitude and ability to rapidly adapt and learn.

Must have skills:

• Extensive server-side, hands-on Java 8+ development experience with strong Spring, Spring Boot & Hibernate
• Strong understanding of Microservice architecture
• Experience building web services and APIs on REST
• Strong understanding of unit & integration tests, following TDD / BDD
• Experience using test frameworks like Junit, Mockito, Power Mockito & Wire mock
• Experience and understanding of CICD pipeline of Docker, Jenkins and Kubernetes
• Understanding of all the agile ceremonies.
• Good understanding of JSON and XML
• Experience in Relational Database Management System (e.g. PostgreSQL)

Nice to have skills:

• Knowledge of Workflow/Business Process Management tools
• Experience with front end technologies: HTML, JavaScript, jQuery, Mustcahe Templates
• Experience with Performance and Monitoring tools: JMeter, Kibana, Splunk, Dynatrace
• Experience writing Shell script
• Basic understanding of Python
• Good understanding on AWS services (EC2, ECS, EKS, API Gateway and Serverless technologies)
• Integration Engine tools: Apache Camel and Active MQ for messaging, web services and distributed systems
• Public Sector domain experience preferable

Job Title: Senior Automation Test Engineer (Embedded) Salary: Up to £85,000 Location: Cambridge (3 days on site ideally) We're on the hunt for a strong Senior Automation Test Engineer with a Python background who can build test automation frameworks from scratch. This is on behalf of a company that are working on the development of their next generation products within the telecoms space. To be successful in this role, you will need knowledge of networking protocols (I.e. TCP/IP) and a solid embedded testing background. What will you be involved in? Designing and building scalable test automation frameworks from scratch (e.g. keyword-driven, data-driven) for embedded systems within the wireless telecoms domain (gNodeB, core network, UE). Developing and managing CI/CD pipelines for automated test execution, reporting, and continuous validation. Orchestrating and automating multi-node environments to simulate real-world network traffic and interactions. Creating and executeting test scenarios to validate system behaviour under varying traffic conditions. Analysing logs from both 5G protocol and network traffic perspectives to identify defects, performance issues, and bottlenecks. Generating test data, automate reporting, and track execution results and failures across complex test suites. Producing and maintaining technical documentation, including system architecture and API specifications.Skills & Experience Essential: Solid experience developing test automation frameworks and hands-on experience orchestrating multi-node systems for embedded systems or telecoms Proven experience building and maintaining CI/CD pipelines from the ground up. Strong understanding of embedded systems testing, including hardware/software integration. Proficiency in programming languages such as Python, Java, or C++ for automation. Experience with network analysis and tracing tools (e.g. TCPdump, Wireshark, strace). Knowledge of networking protocols (TCP/IP, UDP, SCTP, 5G) and an understanding of networking fundamentals (IPv6, DNS, DHCP, NAT) and network security concepts. Experience with test frameworks and reporting tools (e.g. TestNG, JUnit, Allure, ReportPortal). Familiarity with containerisation and distributed environments (Docker, Kubernetes). Experience with network orchestration and performance testing tools (e.g. OpenStack, Xena, Ixia, Spirent). An understanding of the Linux networking stack (TCP/IP, UDP, SCTP, Netfilter, iptables, nftables). Strong analytical and problem-solving skills with the ability to diagnose complex system issues. Excellent communication skills and ability to work effectively in collaborative environments

Contract
Daily Rate: Up to £700 (inside IR35 via umbrella)
Contract Length: 12 months

Hybrid working - 3 days in Chester per week and 2 days remote working

Are you an experienced Java Developer looking for an exciting opportunity to advance your career? Our client, a leading organisation in the financial sector, is seeking a skilled Java Developer to join their dynamic team. This is a temporary contract role that offers the flexibility of hybrid working, allowing you to maintain a healthy work-life balance while contributing to innovative software solutions.

Key Responsibilities:

Develop, enhance, debug, support, maintain, and test software applications that align with business unit needs.
Participate in the design, development, and implementation of complex applications, utilising new technologies.
Provide technical direction and system architecture for projects, ensuring high-quality deliverables.
Lead projects and coordinate activities of team members involved in special initiatives or operations.
Manage project budgets and collaborate with external programmers to coordinate the delivery of software applications.
Operate under minimal supervision, leveraging your extensive technical knowledge and capabilities.

Qualifications:

7-9 years of relevant IT experience, preferably within a financial domain, with a strong understanding of SDLC methodologies (Waterfall/Agile).
Extensive experience in Java/J2EE, Web Services, and SQL PL/SQL (Oracle).
Proficient in XML, JSON, and their applications within API and Microservice implementations at scale.
Familiar with Eclipse IDE, WebLogic Application Server, or JBoss.
Strong background in Integration Technologies, particularly Mule ESB IDE or equivalent, with previous Middleware experience.
Knowledge of Test-Driven Development and Unit Testing frameworks (Cucumber/Litmus, JUnit).
Ability to contribute to automation, causal analysis, and the development of shared/common solutions.
Excellent verbal and written communication skills, capable of engaging both technical and non-technical audiences.
Strong analytical thinking, attention to detail, team leadership, problem-solving abilities, and innovative thinking.
Experience operating in a highly Agile continuous integration and continuous deployment environment.
Bachelor’s degree in a technical field; Mule certification is a plus.

If you are ready to take on this challenging role and make a significant impact, we want to hear from you! Please submit your CV and a cover letter outlining your relevant experience and why you would be a great fit for this position.

Join us in shaping the future of technology within the financial sector. Apply today!

Adecco is a disability-confident employer. It is important to us that we run an inclusive and accessible recruitment process to support candidates of all backgrounds and all abilities to apply. Adecco is committed to building a supportive environment for you to explore the next steps in your career. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

Job Title: Senior Automation Test Engineer (Embedded)
Salary: Up to 85,000
Location: Cambridge (3 days on site ideally)

We’re on the hunt for a strong Senior Automation Test Engineer with a Python background who can build test automation frameworks from scratch. This is on behalf of a company that are working on the development of their next generation products within the telecoms space. To be successful in this role, you will need knowledge of networking protocols (I.e. TCP/IP) and a solid embedded testing background. What will you be involved in?

• Designing and building scalable test automation frameworks from scratch (e.g. keyword-driven, data-driven) for embedded systems within the wireless telecoms domain (gNodeB, core network, UE).
• Developing and managing CI/CD pipelines for automated test execution, reporting, and continuous validation.
• Orchestrating and automating multi-node environments to simulate real-world network traffic and interactions.
• Creating and executeting test scenarios to validate system behaviour under varying traffic conditions.
• Analysing logs from both 5G protocol and network traffic perspectives to identify defects, performance issues, and bottlenecks.
• Generating test data, automate reporting, and track execution results and failures across complex test suites.
• Producing and maintaining technical documentation, including system architecture and API specifications.

Skills & Experience Essential:

• Solid experience developing test automation frameworks and hands-on experience orchestrating multi-node systems for embedded systems or telecoms
• Proven experience building and maintaining CI/CD pipelines from the ground up.
• Strong understanding of embedded systems testing, including hardware/software integration.
• Proficiency in programming languages such as Python, Java, or C++ for automation.
• Experience with network analysis and tracing tools (e.g. TCPdump, Wireshark, strace).
• Knowledge of networking protocols (TCP/IP, UDP, SCTP, 5G) and an understanding of networking fundamentals (IPv6, DNS, DHCP, NAT) and network security concepts.
• Experience with test frameworks and reporting tools (e.g. TestNG, JUnit, Allure, ReportPortal).
• Familiarity with containerisation and distributed environments (Docker, Kubernetes).
• Experience with network orchestration and performance testing tools (e.g. OpenStack, Xena, Ixia, Spirent).
• An understanding of the Linux networking stack (TCP/IP, UDP, SCTP, Netfilter, iptables, nftables).
• Strong analytical and problem-solving skills with the ability to diagnose complex system issues.
• Excellent communication skills and ability to work effectively in collaborative environments.

Java/J2EE developer

Chester - hybrid

12 month contract

Inside ir35

Description:

• Develops, enhances, debugs, supports, maintains and tests software applications that support business units or supporting functions. These application program solutions may involve diverse development platforms, software, hardware, technologies and tools.
• Participates in the design, development and implementation of complex applications, often using new technologies.
• May provide technical direction and system architecture for individual initiatives.
• Serves as a fully seasoned/proficient technical resource. Will not have direct reports but may lead projects and direct activities of a team related to special initiatives or operations.
• May have responsibility for a project and project budget.
• May collaborate with external programmers to coordinate delivery of software application.
• Routine accountability is for technical knowledge and capabilities. Works under minimal supervision, with general guidance from more seasoned consultants.
• Driving a shared service strategy and performance culture
• Relevant IT experience (SDLC- Waterfall / Agile) preferably within a Financial domain
• Strong experience in Java/J2EE, Web Services, SQL PL/SQL (Oracle)
• Strong knowledge of XML, JSON and its usage within API and Microservice implementations at scale
• Familiarity with Eclipse IDE, WebLogic Application server or JBoss
• Strong experience in Integration Technologies - Mule ESB IDE or equivalent, previous Middleware experiences
• Knowledge of Test-Driven Development and Unit Testing (Cucumber/Litmus, JUnit)
• Able to contribute to 1. Automation 2. Causal analysis 3. Develop shared/common solutions.
• Strong verbal and written communication skills (both to a technical and non-technical audience)
• Analytical Thinking, Attention to Detail, Team Leadership, Problem Solving, Innovative thinking, mentoring
• Operating in a highly Agile continuous integration and continuous deployment environment
• Bachelor’s degree in technical field
• Mule certification

If you believe you have the experience required, please apply with your CV now for instant consideration!

TO APPLY - PLEASE APPLY WITH AN UP-TO-DATE CV

Candidates will ideally show evidence of the above in their CV in order to be considered.

Please be advised if you haven’t heard from us within 48 hours then unfortunately your application has not been successful on this occasion, we may however keep your details on file for any suitable future vacancies and contact you accordingly.

Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone’s chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive.

Location: London
Type: Permanent
Working Pattern: 4xFlex, 37.5 hours per week

We are currently working with a client in the Aerospace & Defence sector who are expanding their London-based team and are looking to hire Software Engineers (Java/AWS) at mid to lead level.

This opportunity sits across a range of Defence, Cyber and Intelligence programmes, focused on developing secure, cloud-based solutions within mission-critical environments.

A key requirement for this position is the ability to obtain and maintain high-level security clearance. If you do not currently hold this, support will be provided throughout the application process.

The Role:

You will work under the guidance of a Software Engineering Lead or, at senior level, take on additional responsibility for technical delivery and supporting wider engineering activities. You may specialise in a particular area or work across multiple disciplines, with a strong focus on the Cyber domain.

Typical responsibilities include:

Conducting software development activities and contributing to technical delivery
Designing and developing tests to debug and validate software
Working with customer requirements to develop mission/business applications
Supporting the full software development lifecycle using appropriate tools, standards and processes
Analysing system capabilities and resolving technical queries
Correcting program errors and maintaining documentation
Preparing operating instructions and technical documentation
Championing automation through Infrastructure as Code (IaC), CI/CD and test automation
Skills & Experience:

Strong proficiency in Java
Knowledge of additional languages such as Python, C++, JavaScript, TypeScript or React (desirable)
Experience developing software for cloud environments, particularly AWS
Understanding of microservices and/or serverless architectures
Familiarity with CI/CD pipelines for cloud deployments
Awareness of challenges when migrating on-premise workloads to the cloud
Knowledge of AWS services such as EC2, EKS, Fargate, IAM, S3 and Lambda
Experience working in Linux environments
Understanding of unit testing and mocking frameworks (e.g. JUnit 5)
Experience with Git version control
Knowledge of Agile development methodologies (SCRUM)
Understanding of relational databases (e.g. Oracle) and/or MongoDB
Familiarity with GitLab CI/CD pipelines
Experience using Atlassian tools (Bitbucket, Jira, Confluence)
Understanding of Elasticsearch, Kibana and Hibernate
Desirable Certifications:

Oracle Java Certification / AWS Certification / ISTQB Certification / OSCP Certification / CCNA Certification

PLEASE NOTE: eDV clearance is required to start. The process can take up to 18 months

Omega is an employment agency specialising in opportunities at all levels within the Engineering, Manufacturing, Aerospace, Automotive, Electronics, Defence, Scientific, Energy & Renewables and Tech sectors