Java Jobs in London

Your new company Well known Financial Services OrganisationYour new role We are working with a leading financial services organisation undergoing a major transformation of its clearing and data estate. As a Data Engineer, you will play a pivotal role in designing and delivering a modern, scalable data platform that supports core clearing operations, advanced analytics, and regulatory reporting.This is a high-impact role at the intersection of business and technology, ideal for an experienced data engineer who enjoys owning end‑to‑end data solutions and contributing to enterprise‑wide data strategy. What you'll need to succeed 5+ years' experience in data engineering or software engineering within financial services or a similarly regulated environment Proven experience delivering at least one production‑grade data platform Strong hands‑on capability with modern data engineering tools such as Python, SQL, Airflow, Spark, Kafka, dbt, Snowflake (or equivalents) Experience with backend technologies (e.g. Java / Spring Boot) and exposure to frontend frameworks (e.g. React) Solid understanding of data governance, lineage, validation, and audit requirements Experience with cloud platforms (AWS, Azure, or GCP) and cloud‑native data architectures Familiarity with DevOps practices, including Docker, Kubernetes, CI/CD, and infrastructure automation Exposure to financial services regulatory frameworks such as EMIR, MiFID II, GDPR, PFMI, or similarWhat you'll get in return An exciting opportunity to join an international organisation working with a major financial services organisation. Furthermore, a competitive day rate for this role will be offered in addition to your own dedicated Hays Consultant to guide you through every step of the application process. What you need to do now 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)

Cloud Engineer

83zero Ltd

+12

Cloud Engineer - Consultant / Senior Consultant

Digital Excellence Hybrid UK Wide

Locations: London, Manchester, Newcastle, GlasgowType: Permanent (Hybrid Working)Salary: Consultant: £45,000 - £55,000 / Senior Consultant: £60,000 - £70,000

Shape the Future of Cloud Engineering

We’re looking for skilled Cloud Engineers to join a growing Digital Excellence practice delivering impactful transformation programmes across multiple industries.

This role has a strong focus on Microsoft Azure and Google Cloud Platform (GCP), helping organisations modernise and scale their cloud environments using cutting-edge DevOps practices.

Your Role

As a Cloud Engineer, you’ll work in collaborative, cross-functional teams to design, build, and optimise cloud-native platforms.

Key responsibilities:

Design, build, and maintain cloud infrastructure (primarily Azure and GCP)
Develop and manage CI/CD pipelines and automation
Implement monitoring, alerting, and performance optimisation
Ensure security, compliance, and system reliability
Troubleshoot production issues and provide operational support
Collaborate with architects, developers, and stakeholders
Champion DevOps culture and best practices
Mentor team members and support capability development

Core technologies:Azure GCP Kubernetes Docker Terraform Git Jenkins GitHub/GitLab Monitoring: Grafana Dynatrace Cloud-native tools

What You’ll Also Be Involved In

Supporting client engagements, proposals, and bids
Contributing to internal innovation and thought leadership
Developing new propositions and services
Gaining certifications and expanding your cloud expertise

About You

Essential:

Active SC Clearance (or eligible to obtain it)
Strong experience with Azure and/or GCP (AWS experience is beneficial but not essential)
Solid understanding of DevOps principles and practices
Experience designing and implementing CI/CD pipelines (e.g. Jenkins, GitHub Actions, GitLab CI)
Hands-on experience with Terraform, Docker, and Kubernetes
Experience with monitoring and alerting tools (e.g. Grafana, Dynatrace)
Scripting experience (e.g. Bash/Shell)
Experience using version control tools (Git, GitHub, GitLab)
Experience working in Agile environments
Strong communication and stakeholder engagement skills

Desirable:

Experience with configuration management tools (Ansible, Puppet, Chef, Packer)
Exposure to testing tools (Selenium, Cucumber)
Experience supporting modern application stacks (Java, Node.js, SQL/NoSQL)

Senior Automation QA Engineer (Data Engineering)

+1

A leading organisation undergoing major investment in its data and engineering capabilities is looking for a Senior Automation QA Engineer to strengthen quality across complex, distributed systems. This role sits at the intersection of software engineering and data engineering, supporting the delivery of high‑quality services and reliable data products at scale. You’ll work closely with cross‑functional teams, driving automation, improving test maturity, and ensuring the accuracy and resilience of data pipelines and backend services. This is a hands‑on role suited to someone who enjoys ownership, technical depth, and influencing engineering best practice. Essential Skills & Experience Strong background in automation testing for microservices‑based architectures. Hands‑on experience building automation frameworks using Java or similar languages. Solid experience testing REST APIs, backend services, and service‑to‑service integrations. Proven experience validating data engineering pipelines (ETL/ELT, batch jobs, scheduled data builds). Strong SQL skills for data validation, reconciliation, and analysis. Experience with data warehouses, data lakes, or big‑data platforms such as Snowflake, Redshift, BigQuery, or Spark. Familiarity with CI/CD tooling (Jenkins, Azure DevOps, GitHub Actions, GitLab CI). Experience working with Git‑based version control. Exposure to cloud environments (Azure, AWS, or GCP). Understanding of distributed systems and microservices architecture. This contract is inside IR35. You will be required to work through an umbrella company for the duration of the project

+3

Role Title / Position: Data Engineer III Type : Contract Duration:12 months Location: Bromley or Chester Job Description: Required qualifications : • Knowledge of professional software engineering & best practices for full software development life cycle, including coding standards, software architectures, code reviews, source control management, continuous deployments, testing, and operational excellence • Experience working on and delivering end to end projects independently • Experience building/operating highly available, distributed systems of data extraction, ingestion, and processing of large data sets • Experience with data modeling, warehousing and building ETL pipelines • Experience in at least one modern scripting or programming language, such as Python, Java, Scala, or NodeJS • Experience as a data engineer or related specialty (e.g., software engineer, business intelligence engineer, data scientist) with a track record of manipulating, processing, and extracting value from large datasets • Experience with SQL Preferred qualifications • Experience with AWS technologies like Redshift, S3, AWS Glue, EMR, Kinesis, FireHose, Lambda, and IAM roles and permissions • Experience with non-relational databases / data stores (object storage, document or key-value stores, graph databases, column-family databases) • Experience with Apache Spark / Elastic Map Reduce

Python Developer - FX Options Data Engineer - Citi

+3

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
Python Developer - FX Options Pricing and Market Data Distribution
The FX Options Pricing and Market Data distribution team is going through significant reengineering and modernisation. We are looking for an experienced Python developer and technologist to take a hands-on role in building out data analytics capabilities and developing frameworks that enable data scientists to leverage market data.
Responsibilities:

Contribute to the design and development of the electronic FX Options Data Platform
Building out reliable and fast data pipelines for quantitative analysis and trading.
Design, build and support our data analytic infrastructure
Collaborate with a global team of developers, quants and traders to translate business requirements into robust technical solutions
Drive the design and development of system architecture, work with users of the system, and enhance the quality of deliverables
Contribute to the continuous improvement of development, deployment and testing processes
Share your knowledge and mentor other developers, fostering a collaborative and innovative team environment

Required Skills:

Strong knowledge and experience of Python development.
Experience implementing front office systems for Quants and Trading.
Proficiency with Python frameworks such as FastAPI, Flask etc for building scalable applications
Experience with Python libraries for financial applications (NumPy, Pandas, asyncio)
Hands-on practical experience delivering system design, application development, testing, and operational stability, particularly in Linux based cloud environments
Openshift/Kubernetes experience with containerized Python applications
Caching technologies e.g. Redis, Memcached or others
Middleware technologies: Kafka, RabbitMQ, Solace, or other message brokers
Experience with Python package management and dependency management (pip, uv, conda)
Awareness of industry trends and leveraging new technologies as appropriate
Proven track record of building new systems, replacing legacy systems and renovating existing systems

Nice to have:

Java and/or C# development experience
Experience with quantitative libraries
Familiarity with CI/CD pipelines for Python applications
Experience working in finance

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.

Platform Engineer - Internal Developer Platform

+6

Entity:

Technology

Job Family Group:

IT&S Group

Job Description:

Our purpose is to deliver energy to the world, today and tomorrow. For over 100 years, bp has focused on discovering, developing, and producing oil and gas in the nations where we operate. We are one of the few companies globally that can provide governments and customers with an integrated energy offering. Delivering our strategy sustainably is fundamental to achieving our ambition to be a net zero company by 2050 or sooner.

About the Role

We’re hiring a Platform Engineer to help build Yalla , our Internal Developer Platform (IDP). Yalla enables teams across our organisation to provision infrastructure, deploy code, and operate services in a secure and standardised way — all via self-service.

This is a hands-on engineering role working across the full stack: you’ll be building on top of the core platform (using Kubernetes, ArgoCD, and Crossplane), as well as any supporting tooling such as the developer portal, backend services, and observability that bring Yalla to life for product teams.

You’ll work closely with internal users to understand developer needs, simplify workflows, and turn complex platform capabilities into intuitive developer experiences (DevEx).

What You’ll Do

Design, build, and operate features across the full Yalla stack — including:
Platform infrastructure (Kubernetes, GitOps, provisioning workflows)
Backend APIs and services (e.g., service catalog, deployment orchestration)
Frontend portal (React-based developer UI)
Tooling (Observability, Artifact Storage, Azure DevOps)
Build reusable templates and automation for provisioning environments, services, and CI/CD pipelines.
Integrate with tools like ArgoCD, Crossplane, and language-native build systems (Go, .NET, Java, Node.js, Python).
Contribute to platform contracts and APIs used by product teams.
Collaborate with engineers across the company to define platform standards and improve developer experience.
Improve reliability, observability, and security across all layers of the platform.

What We’re Looking For

Must-Have:

Proven experience building and deploying full-stack applications with at least one high-level programming language (ideally React + Go/ .NET/ Java/ Node.js/ Python).
Strong understanding of cloud-native architecture (AWS/Azure) and Kubernetes.
Familiarity with GitOps workflows and infrastructure-as-code (e.g., Terraform, Crossplane, Helm).
Experience with CI/CD tooling (Azure DevOps, GitHub Actions, etc.).
Ability to work across front-end and back-end boundaries, turning platform concepts into intuitive UX.
Comfortable navigating a mixed-language environment.

Nice-to-Have:

Experience building internal platforms, IDPs(Internal Developer Platform), or self-service developer tooling.
Experience of working in a monorepo.
Knowledge of service communication patterns (REST, GraphQL, gRPC, messaging).
Experience in secure, regulated environments (e.g., SoX, audit requirements).
Exposure to policy-as-code tools (e.g., OPA, Kyverno, Cedar).
Familiarity with design systems or component libraries used for internal portals.

Why join us?

At bp, we support our people to grow in a diverse and exciting environment. We believe that our team is strengthened by diversity.

There are many aspects of our employees’ lives that are meaningful, so we offer benefits to enable your work to fit with your life. These benefits can include flexible working options, a generous paid parental leave policy, excellent retirement benefits, among others!

We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.

Reinvent your career as you help our business meet the challenges of the future. Apply now!

Travel Requirement

No travel is expected with this roleThis role is not eligible for relocation

Remote Type:

This position is a hybrid of office/remote working

Skills:

Agility core practices, Agility core practices, API and platform design, Cloud Platforms, Collaboration, Communication, Configuration management and release, Continuous deployment and release, Creating a high performing team, Digital Project Management, Documentation and knowledge sharing, Emerging technology monitoring, Facilitation, Information Security, Mentoring, Metrics definition and instrumentation, NoSql data modelling, Problem Solving, Relational Data Modelling, Risk Management, Scripting, Secure development, Service operations and resiliency, Software Design and Development, Solution Architecture {+ 6 more}

Legal Disclaimer:

We are an equal opportunity employer. We do not discriminate on the basis of protected characteristics like race, religion, color, sex, national origin, sexual orientation, veteran status or disability status. Individuals with an accessibility need may request an adjustment/accommodation related to bp’s recruiting process (e.g., accessing the job application, completing required assessments, participating in telephone screenings or interviews, etc.). If you would like to request an adjustment/accommodation related to the recruitment process, please contact us.

If you are selected for a position and depending upon your role, your employment may be contingent upon adherence to local policy. This may include pre-placement drug screening, medical review of physical fitness for the role, and background checks.

Data Engineer (Spark/ Kubernetes) (Financial Services)

Your new company Working for a renowned financial services organisation Your new role We are seeking a Data Engineer to support the replacement of a legacy ETL tool with a modern Apache Spark based data platform. This is a hands‑on engineering role focused on building and supporting Spark jobs, with an emphasis on performance, reliability, and scalability. The role sits within a small Agile delivery team of four engineers (two onshore and two in Shenzhen), working closely with a Senior Data Engineer. You will be responsible for development work, sprint delivery, demos, documentation, and stakeholder engagement. This position suits a mid‑level engineer with strong Spark development experience rather than design, infrastructure, or management responsibilities. What you'll need to succeed Strong hands‑on experience with Apache Spark - Writing and tuning Spark jobs /PySpark development experience. Strong experience working in with containerised environments using Kubernetes. Experience with programming in Python or Scala Exposure to Big Data technologies and distributed data processing Have some working knowledge of Java or Java Spring boot development background Experienced in an Ops way of working, not pure development only - you know how to deploy solutions. Experience with OpenShift would be highly desirable! Experience working in an Agile way of working (Scrum, sprints, demos) Financial services or professional services experience required. What you'll get in return Flexible working options available. What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. 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)

Data Engineer (Spark/ Kubernetes) (Financial Services)

Your new company Working for a renowned financial services organisation Your new role We are seeking a Data Engineer to support the replacement of a legacy ETL tool with a modern Apache Spark based data platform. This is a hands‑on engineering role focused on building and supporting Spark jobs, with an emphasis on performance, reliability, and scalability. The role is focused on building nonperformance Apache Spark jobs, with a strong emphasis on performance optimisation. You shall be running Spark workloads in containerised environments using Kubernetes and programming skillset in Python/ Scala or Java is also a required skillset. The role sits within a small Agile delivery team of four engineers (two onshore and two in Shenzhen), working closely with a Senior Data Engineer. You will be responsible for development work, sprint delivery, demos, documentation, and stakeholder engagement. This position suits a mid‑level engineer with strong Spark development experience rather than design, infrastructure, or management responsibilities. What you'll need to succeed Strong hands‑on experience with Apache Spark - Writing and tuning Spark jobs /PySpark development experience. Strong experience working in with containerised environments using Kubernetes. Experience with programming in Python or Scala Exposure to Big Data technologies and distributed data processing Have some experience using Java/ Java Spring boot for development. Experienced in an Ops way of working, not pure development only - you know how to deploy solutions. Experience with OpenShift would be highly desirable! Experience working in an Agile way of working (Scrum, sprints, demos) Financial services or professional services experience required. What you'll get in return Flexible working options available. What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. 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)

Full Stack Software Engineer

+3

We are looking for a talented Software Engineer to join a team developing advanced software solutions. This role offers the opportunity to work on complex projects while collaborating with experienced engineers and technical specialists.

Full Stack Software Engineer

Salary - £50,000 - £80,000 per year, depending (Bonus and Benefits)

Clearance: eDV

Location: Hampshire or Surrey

Contract options also available.

About the role

You will contribute to the design, implementation, and testing of software components within an agile development environment. Depending on your expertise, the role may involve work on modern UI development or embedded software.

At Forward Role, the client has received glowing testimonials for the team specifically around the support staff receive, the cross-functional nature of programmes, and potential for growth in the business.

Key Responsibilities

Design and develop software components for technology products
Implement and test software as part of an agile development team
Collaborate with product and technical teams to deliver high-quality solutions
Contribute to the ongoing development and improvement of existing systems
Participate in technical discussions and evaluate design trade-offs
Work closely with internal teams and stakeholders across engineering disciplines

Essential Requirements

Experience in software engineering across the full product development lifecycle
Understanding of modern software architecture practices
Experience implementing scientific or algorithm-based applications
Proficiency in programming languages such as C, C++, Python, or Java
Experience with Agile methodologies (Scrum or Kanban)
Familiarity with development tools such as Git, GitLab, and VS Code

Desirable Skills

Experience with modern UI design and development
Embedded software development, including cross-compiling and deployment
Degree in Computer Science, Software Engineering, Engineering, or a related field
Experience with Linux operating systems and development tools
DevOps experience, including CI/CD pipelines, GitLab scripting, or Docker

Security Requirements

Due to the nature of the work, candidates must meet the criteria required to obtain the highest level of UK security clearance. This typically requires sole UK nationality and long-term UK residency.

As an industry leading, nationwide Marketing, Digital, Analytics, IT and Design recruitment agency, we are continually receiving new assignments to work on, so keep a close eye on our website, Facebook, LinkedIn and Twitter pages for a full list of current permanent and interim opportunities as well as marketplace news and fun stuff.
Forward Role is operating as an employment agency.

Data Platform Engineer- Leading Quant-Driven Market-Maker

Location: London

About the Role

Join a small, high-impact team responsible for the firm’s most critical datasets - including corporate actions, fundamentals, and index membership data. Rather than chasing breadth, this team focuses on data depth: building a clean, unified, and intelligent data layer that underpins all major decisions across the business.

We build distributed pipelines to ingest, clean, and expose daily datasets to internal teams. This is an engineering-first team with strong autonomy - ideal for someone who enjoys taking ownership of data quality, system design, and intelligent automation.

What You’ll Do

Own and improve automated data ingestion and processing pipelines
Design and maintain distributed systems for reliable, scalable data access
Identify and fix data anomalies using statistical and algorithmic approaches
Collaborate directly with internal users across research, trading, and operations
Anticipate future data needs and help evolve a minimal, robust data schema

Hard Requirements

Strong coding skills in a statically typed language (e.g. Go, Java, C++)
Solid background in distributed systems and relational databases
Comfortable with data analysis; knowledge of statistics or ML is a plus
Proactive problem-solver with a deep sense of ownership

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If you think you’re a good match for the role and would like further info, please contact:

Ali Wilson
ali.wilson@oxfordknight.co.uk
(+44) 07412908641
linkedin.com/in/alexander-wilson-050

Frontend Software Engineer - Morgan McKinley

Frontend Software Engineer (Contract)

£600 - £685 per day (Inside IR35)
Initial contract until 31st December
ASAP start

We’re currently partnering with a global technology organisation to hire an experienced Frontend Software Engineer to join a high-impact product team focused on building and evolving critical compliance and verification tooling. This is an excellent opportunity to work on complex, large-scale frontend systems within a modern engineering environment, contributing to the simplification and unification of multiple internal tools into a single, streamlined platform.

You’ll take ownership of frontend development across key products, working closely with compliance stakeholders to design and deliver intuitive, scalable solutions.

Build and enhance modern web applications using React and TypeScript
Work across a micro-frontend architecture
Contribute to end-to-end feature development, from design through to deployment
Collaborate with cross-functional teams
Help unify multiple internal tools into a single platform
Challenge and improve existing processes and workflows
Work with APIs (GraphQL & REST) to integrate backend services

Skills & Experience:

Essential:

Strong frontend expertise with React & TypeScript
Experience with GraphQL and REST APIs
Background working in product-focused environments
Experience in modern engineering practices (CI/CD, cloud environments, etc.)
Ability to own features end-to-end and challenge requirements

Desirable:

Exposure to micro-frontends
Knowledge of AWS, Kubernetes or CI/CD tooling
Experience in fintech, payments or regulatory environments (KYC, compliance)
Backend exposure (e.g. Java)
Experience migrating from Vue/Next.js to React

Working Arrangements:

Hybrid working - flexible approach to office attendance
Typically 1 day every 2 weeks in the office

Apply Now: This is a fast-moving role with interviews scheduled imminently, so early applications are strongly encouraged.

Senior Java Developer

Senior Java Developers with a passion for cutting-edge technology and a desire to work on a flagship platform rebuild, look no further for your next role! We have an exceptional opportunity with a leading financial services technology vendor based in the heart of London.

As a Senior Java Developer within this team, you will play a crucial role in the next phase of their growth, working on autonomous software at the core of their processes. You will have the opportunity to bring the most cutting-edge technology to their global client pool, with a focus on low-latent messaging solutions and highly available event-driven services.

Must have experience:

5+ years experience in JVM, we use both Kotlin and Java
Multi-threading, concurrency and Low-latency experience
Exposure to Kotlin as well as Strings, Memory Management and associated problems a plus
Automated test experience, Unit testing and Integration testing
An understanding of message-driven programming and messaging systems
Experience with FIX and Kafka a huge plus

To excel in this role, you will need a minimum of 7 years’ experience in JVM, with proficiency in both Kotlin and Java. Experience in multi-threading, concurrency, and low-latency is essential, as well as exposure to Kotlin, Strings, Memory Management, and associated problems. Automated test experience, including unit testing and integration testing, is also required.

An understanding of message-driven programming and messaging systems, along with experience in FIX and Kafka, would be highly advantageous. If you are ready to take the next step in your career and make a significant impact in the world of financial technology, apply now and join the team.

Data Engineer (Apache Spark) - (Financial Services)

Your new company Working for a renowned financial services organisation Your new role We are seeking a Data Engineer to support the replacement of a legacy ETL tool with a modern Apache Spark based data platform. This is a hands‑on engineering role focused on building and supporting Spark jobs, with an emphasis on performance, reliability, and scalability. The role is focused on building nonperformance Apache Spark jobs, with a strong emphasis on performance optimisation. It is primarily Java‑based, with Python strongly encouraged; experience across Java, Python, and Scala is ideal, with Java and Python being the preferred combination. The role sits within a small Agile delivery team of four engineers (two onshore and two in Shenzhen), working closely with a Senior Data Engineer. You will be responsible for development work, sprint delivery, demos, documentation, and stakeholder engagement. This position suits a mid‑level engineer with strong Spark development experience rather than design, infrastructure, or management responsibilities. What you'll need to succeed Strong hands‑on experience with Apache Spark - Writing and tuning Spark jobs /PySpark development experience Strong Java or Java Spring boot development background Experience with programming in Python or Scala Exposure to Big Data technologies and distributed data processing Working with containerised environments using Kubernetes/ Airflow. Agile ways of working (Scrum, sprints, demos) Comfortable working in a distributed team Financial services or professional services experience required. What you'll get in return Flexible working options available. What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. 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)

Data Engineer DV Cleared

Here’s a sharper, more compelling version in your tone, with stronger pull and a bit more energy without overdoing it:

DV Cleared Data Engineers UK, London, Manchester, Bristol, Hybrid

Active DV Clearance required, no exceptions

We’re supporting a leading UK organisation delivering secure, production-grade data platforms across defence and national security.

This is not theory, or internal tooling. This is real engineering, in live environments, where the output directly supports critical decision making.

The Role

You’ll design, build and run end-to-end data pipelines powering high-impact systems in secure environments.

Working in modern cloud architectures, you’ll help deliver scalable, resilient platforms where performance and reliability genuinely matter.

What you’ll be doing

• Building robust pipelines across ingestion, transformation and serving layers • Working with Python, SQL and APIs to curate and operationalise data • Handling large scale, complex datasets, structured and unstructured • Integrating multiple data sources into scalable platforms • Collaborating with engineers, architects and stakeholders to deliver real outcomes

Tech environment

Python, SQL, Spark, Java or Scala AWS, Azure or GCP Modern, distributed data architectures

What we’re looking for

• Active DV clearance, essential • Proven experience building production grade data pipelines • Strong engineering mindset, not just scripting or analysis • Experience with big data tooling and cloud platforms • Comfortable operating in fast paced, delivery focused environments

Why this role

You’ll be working on systems that actually get used, in environments where failure isn’t an option.

High impact, high trust, and technically challenging work, with real ownership from day one.

**DV cleared and open to a conversation? Let’s talk

Senior Application Security Engineer - London Stock Exchange Group

London Stock Exchange Group

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 65 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 values of Integrity, Partnership, Excellence and Change 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 65 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 profile:

Enable the Group to operate and expand an Application Security Programme and reduce application-level vulnerabilities.

ROLE SUMMARY:

The role focuses on driving the implementation and growth of the Application Security Programme to reduce vulnerabilities across applications. It involves partnering with product teams to integrate security practices into development workflows, analysing scan results, and guiding effective remediation strategies. Success in this position requires strong collaboration, technical expertise in security tools, and the ability to communicate technical information clearly to diverse stakeholders.

WHAT YOU’LL BE DOING:

Collaborating across teams to tackle vulnerabilities head-on and design effective, practical mitigation strategies.
Leading security excellence by engaging with stakeholders to strengthen and continuously improve the organization’s application security posture.
Turning insights into action by analysing security scan results, validating findings, eliminating false positives, and guiding informed remediation decisions.
Driving alignment and innovation by sharing knowledge, setting clear objectives, and delivering impactful application security outcomes.
Empowering product teams by seamlessly integrating Application Security solutions into their development workflows.

WHAT YOU’LL BRING:

Technical Foundation

A strong understanding of common and emerging vulnerabilities across web applications, APIs, and other platforms, along with knowledge of key security standards such as OWASP Top 10, SANS Top 25, NIST, and ASVS.
Hands-on experience with security tools like SAST, SCA, and container scanning, plus familiarity with programming languages such as Java, C#, and Python.
Knowledge of modern development practices, including Agile, DevOps, and SecDevOps, enabling you to work effectively in fast-paced environments.

Vulnerability Management

Proven experience managing remediation activities within application security and the ability to clearly explain the rationale behind security fixes to ensure understanding and impact.
Strong analytical skills to interpret and correlate data from sources like SAST, SCA, and penetration tests, identifying trends and prioritizing remediation efforts.
The capability to link issues across multiple layers-code, infrastructure, identity, cloud environments, and third-party services-and propose process improvements to reduce systemic vulnerabilities and recurring risks.

Collaboration & Communication

Ability to work effectively with technical and business teams, manage expectations, and deliver clear, actionable insights to stakeholders at all levels. Adept at handling complex situations with integrity and clarity.

Desirable - Automation Experience

Hands-on experience implementing automated security testing at scale (SAST, SCA, containers) and troubleshooting integration issues between security tools and development environments.

WHAT YOU’LL GET IN RETURN:

Work with some of the most talented minds in the industry, collaborating on impactful security initiatives that make a real difference globally.
Be part of an industry that brings immense value to customers worldwide and is highly respected, giving you the chance to contribute to meaningful outcomes.
Create and innovate as an engineer, building new solutions and shaping the future of application security.
Join a fun and innovative company that encourages creativity and fresh ideas.
Expand your skill set by learning new tools, techniques, and approaches in a dynamic environment.
Enjoy a positive, balanced work culture that prioritizes well-being and fosters a happy, collaborative atmosphere.

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.

Lead Developer - London Stock Exchange Group

London Stock Exchange Group

Lead Java Developer

Business Unit: FTSE Russell - Index Platform
Company: London Stock Exchange Group (LSEG)

About the Role

We are seeking a highly skilled and hands - on Lead Java Engineer with AI proficiency to help build the next generation FTSE Russell Index Platform. This platform underpins the calculation and distribution of FTSE Russell’s global family of indexes and requires advanced engineering, high precision data processing, and deep collaboration across global teams.

This is a deeply technical role focused on designing, building, integrating, and operationalising modern software and AI driven capabilities across internal platforms and client facing products. You will work with innovative technologies, contribute to complex algorithmic design, and drive engineering excellence in a high performance , data intensive environment.

Key Responsibilities

Core Engineering & Platform Delivery

Design, develop, and maintain complex Java and Python applications using modern engineering practices. Build / embed AI powered features into mission critical systems.
Architect and enhance services that support large scale , performance critical index computations.
Collaborate with Product Managers, UX, and engineering teams globally to deliver high quality products.
Lead projects end - to - end through requirements, design, development, testing, deployment, and operations.
Build and maintain automated test suites to ensure performance, scalability, and security.
Diagnose production issues, identify root causes, and deliver Level 3 support and fixes.
Conduct peer reviews, provide technical leadership, and mentor junior engineers.

Required Experience & Skills

12+ years of hands - on backend software engineering experience.
Support the organisation’s AI adoption journey . Develop and enhance intelligent solutions using LLMs, LangChain / LangGraph , and agentic AI frameworks.
Establish engineering best practices for safe, scalable, traceable and production ready AI deployments across internal platforms and external product suites.
Strong algorithms, data structures, problem solving skills , and ability to translate business problems into scalable solutions.
Good command of coding standards and Strong understanding of both high level and low level software design
Expertise in:
Core Java , Python
Building highly distributed, data intensive systems
Microservices, REST APIs
RDBMS (Oracle/SQL Server/Postgres)
CI/CD tools (Jenkins/GitLab), DevOps automation
Docker, Kubernetes
JVM profiling & performance optimisation
Prior exposure to Level 3 production support.

Preferred / Nice-to-Have Skills

Experience leading or mentoring a team of engineers .
Experience within financial services or with financial market data.
Familiarity with in - memory caching, Spring Boot, Redis, Kafka.
Experience with BDD frameworks such as Cucumber, JBehave , or Karate.
Experience running Agile teams.

What We’re Looking For

A proactive , creative engineering leader who enjoys solving complex problems, working hands - on with modern technologies, and driving AI enabled innovation. If you’re passionate about building resilient, intelligent, data intensive systems that power global financial markets, we’d love to hear from you.

Benefits

We are looking for intellectually curious people, passionate about the bigger picture of how technology industry is evolving, ready to ask difficult questions and deal with complicated scenarios! If you are creative and a problem solver, this is the place to be as will be supporting you to fast-forward your career!

We enhance each employee’s potential through personal development through a wide range of learning tools both formal and informal.

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. You will be part of a collaborative and creative culture where we encourage new ideas and are committed to sustainability across our global business. You will experience the critical role we have in helping to re-engineer the financial ecosystem to support and drive sustainable economic growth. Together, we are aiming to achieve this growth by accelerating the just transition to net zero, enabling growth of the green economy and creating inclusive economic opportunity.

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

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.

Career Stage:
Manager