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 commitment 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

Lead DevOps Engineer - Cloud Platform & Site Reliability
Location: Nottingham or London, UK
Team: LSEG Risk Intelligence Engineering

Are you passionate about building scalable, secure, and resilient platforms that power global Risk Intelligence products?

We’re looking for a Lead DevOps Engineer to help drive innovation, mentor the DevOps engineering team and shape the future of our cloud-native infrastructure.

WHAT YOU’LL BE DOING

As a Lead DevOps Engineer, you’ll be a hands-on technical leader, guiding the design and implementation of modern DevOps and platform engineering practices:

• Automate full-stack infrastructure using Terraform and GitLab
• Lead the design of CI/CD pipelines with GitLab CI to enable fast, secure, and reliable software delivery
• Deploy and manage Kubernetes workloads using Amazon EKS and Istio Service Mesh for service discovery, traffic management, and observability
• Implement monitoring and alerting to ensure high availability, performance, and reliability
• Collaborate with cross-functional teams to ensure infrastructure aligns with development and business goals
• Mentor and guide DevOps engineers, fostering a culture of continuous improvement, automation, security and operational excellence
• Evaluate and implement new technologies to enhance platform capabilities and developer experience

WHAT YOU’LL BRING

• Demonstrable AWS and Kubernetes (EKS) expertise
• Hands-on experience with Terraform, GitLab CI and Bash/Python
• Orchestration and monitoring tools - Istio, Datadog, Grafana, Prometheus, ELK
• 6+ years in DevOps or Platform Engineering roles experience in a lead role
• Proven experience building and operating cloud-native platforms
• Strong communication, problem solving and collaboration skills

PREFERRED SKILLS & EXPERIENCE

• Development experience in a major language (Java, C++, C# etc.)
• AWS certifications and financial services background

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 commitment 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

Senior DevOps Engineer - Cloud Platform & Site Reliability
Location: Nottingham or London, UK
Team: LSEG Risk Intelligence Engineering

Are you passionate about building scalable, secure, and resilient platforms that power global Risk Intelligence products?

We’re looking for a Senior DevOps Engineer to help drive innovation, implement modern DevOps practices, and contribute to the evolution of our cloud-native infrastructure.

WHAT YOU’LL BE DOING

As a Senior DevOps Engineer, you’ll play a key role in designing, building, and maintaining the infrastructure and automation that powers our platforms:

• Automate full-stack infrastructure using Terraform and GitLab
• Build and maintain CI/CD pipelines with GitLab CI to enable fast, secure, and reliable software delivery
• Deploy and manage Kubernetes workloads using Amazon EKS and Istio Service Mesh for service discovery, traffic management, and observability
• Implement monitoring and alerting to ensure high availability, performance, and reliability
• Collaborate with cross-functional teams to ensure infrastructure aligns with development and business goals
• Continuously improve systems through automation, performance tuning, and process optimisation
• Contribute to our DevOps culture, sharing knowledge and best practices across the team

WHAT YOU’LL BRING

• Demonstrable AWS and Kubernetes (EKS) expertise
• Hands-on experience with Terraform, GitLab CI and Bash/Python
• Orchestration and monitoring tools - Istio, Datadog, Grafana, Prometheus, ELK
• 4+ years in DevOps or Platform Engineering roles
• Proven experience building and operating cloud-native platforms
• Strong communication, problem solving and collaboration skills

PREFERRED SKILLS & EXPERIENCE

• Development experience in a major language (Java, C++, C# etc.)
• AWS certifications and financial services background

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.

+6 months +

+Fully remote working

+SC cleared - must hold current active clearance

+Sole British nationals only - due to nature of the project

Skills:

+AWS

+DevOps Engineer

+Kubernetes

+Public Sector experience

+Testing experience - can set the Testing process up from beginning to end and to be able to own it

We’re looking for an experienced AWS DevOps Engineer to design, build, and optimise secure, scalable cloud environments in a fully remote role.

Key Responsibilities

• Deliver Infrastructure as Code using Terraform, CloudFormation, or Ansible
• Build and manage containerised environments with Docker and Kubernetes
• Architect and optimise AWS services across compute, networking, storage, and security
• Design and maintain CI/CD pipelines (Jenkins, GitLab CI, GitHub Actions, CircleCI)
• Automates testing, integration, and deployment processes.
• Embed DevSecOps practices using tools such as SonarQube, Snyk, and OWASP
• Implement monitoring and logging (Prometheus, Grafana, ELK)

Experience Required

• 5-10+ years in DevOps / Cloud Engineering
• Testing experience - can set the Testing process up from beginning to end and to be able to own it
• Strong AWS architecture and security expertise
• Proven IaC and CI/CD delivery experience
• Solid Docker and Kubernetes knowledge
• Ability to influence stakeholders and mentor teams

Fully remote, high-impact role within a forward-thinking cloud engineering team.

If you’d like to discuss this AWS DevOps Engineer in more detail, please send your updated CV to (url removed) and I will get in touch.

Our client, a prominent entity within the Defence & Security sector, is currently searching for a dedicated and skilled DevOps Systems Engineer (Systems Solutions Engineer) to join their team in Wiltshire.

This is more than a job - it’s a mission. You will be part of a high-impact, collaborative environment, contributing to the vision of designing, delivering, and transforming collective training for the UK forces.

Key Responsibilities:

• Designing, deploying, and supporting integrated system and application solutions across physical, virtual, and cloud environments through CI/CD pipelines
• Translating operational and technical requirements into implementable system architectures and solution designs
• Supporting the deployment, configuration, and integration of systems and applications within development and operational environments
• Ensuring system solutions meet performance, reliability, security, and interoperability requirements across platforms and environments
• Acting as the technical liaison between engineering teams and supply chain partners
• Reviewing technical proposals and assisting with integration planning
• Coordinating with engineering and supply chain teams to ensure delivered components and systems meet required technical and operational specifications
• Supporting system testing, validation, and troubleshooting to ensure successful deployment and operational readiness
• Collaborating with cross-functional teams including software engineers, network engineers, architects, and programme teams
• Integrating third-party technologies and vendor solutions into the broader systems architecture
• Developing and maintaining technical documentation
• Maintaining awareness of emerging technologies and tools

Job Requirements:

We are looking for individuals who have a mission focus and the enthusiasm and drive to ‘get things done’. You should be able to collaborate effectively with defence organisations. The ideal candidate will possess the following skills and experience:

• Engineering background with a degree in a relevant discipline or equivalent professional experience
• Proven experience designing, deploying, and supporting integrated systems and application solutions across hybrid environments (cloud and on-premise)
• Strong understanding of systems integration principles across software, infrastructure, and networking layers
• Ability to translate operational and technical requirements into practical system architectures and deployment plans
• Experience supporting technical deployments within structured delivery environments (e.g. Agile or SAFe)
• Strong analytical and problem-solving capability with experience diagnosing complex system issues
• Understanding of system security principles and governance requirements
• Experience designing and deploying containerised solutions using orchestration technologies (e.g. Docker, Kubernetes)
• Experience implementing CI/CD pipelines and DevOps tooling (e.g. GitHub, ArgoCD, Helm, Maven, SonarQube, Quay or equivalent)
• Experience using monitoring and observability platforms (e.g. Prometheus, Fluentd, ELK stack, Grafana)
• Experience integrating and supporting database solutions (e.g. MongoDB, PostgreSQL, MSSQL)
• Experience deploying and operating systems within cloud platforms such as Azure or AWS
• Experience supporting system testing, validation, and troubleshooting during deployment and operational phases

Desirable Skills and Experience:

• Experience working with Red Hat OpenShift and Ceph storage platforms
• Programming experience (e.g. Python, JavaScript)
• Experience working with event streaming and data pipeline technologies (e.g. Kafka, Apache NiFi, Apache Spark)
• Experience delivering multi-system integration projects within defence, government, or highly regulated environments
• Experience implementing and configuring training simulation technologies across Live, Virtual, and Constructive (LVC) environments
• Experience working with external suppliers and vendors to deliver integrated technical solutions
• Experience supporting procurement or supply chain teams by translating technical specifications and integration requirements
• Understanding of interoperability standards or integration frameworks used within enterprise or defence systems

Benefits:

• Competitive salaries
• 25 days holiday + statutory public holidays, with an option to buy and sell up to 5 days
• Contributory Pension Scheme (up to 10.5% company contribution)
• Company bonus scheme (discretionary)
• 6 times salary ‘Life Assurance’ with pension
• Flexible Benefits scheme including Health Cashplan, Dental, and Cycle to Work amongst others
• Enhanced sick pay
• Enhanced family friendly policies including enhanced maternity, paternity & shared parental leave
• Car / Car allowance (dependant on grade/ role)
• Private Medical Insurance (dependant on grade)

Work Culture:

• 37hr working week, although hours may vary depending on role or job requirement
• Early finish on Fridays, starting the weekend at 1.30pm
• Remote, hybrid, and site-based working opportunities
• A flexible working culture that is output focussed
• Up to 5 paid days volunteering each year

If you are a capable and committed DevOps Systems Engineer (Systems Solutions Engineer) looking for a new opportunity to develop your career within the Defence & Security sector, we would love to hear from you. Apply now to join our client’s dynamic and talented team in Wiltshire.

DevOps Engineer (Performance Testing) 6 Months Contract + extension £600 per day (Inside IR35) Remote working Please note active SC Clearance is needed for the role A leading global consultancy is looking for an experienced hybrid devOps and Performance specialist to superhead critical national infrastructure projects. You will essentially ensure the resilience and scalability of a massive cloud-native environment. This is a high-visibility role where you will bridge the gap between infrastructure stability and rigorous performance validation. Key Responsibilities Infrastructure & CI/CD: Design, build, and maintain robust CI/CD pipelines to automate deployment cycles.
Performance Engineering: Lead the charge on system reliability by executing complex performance test runs, identifying bottlenecks, and implementing upgrades.
System Integrity: Proactively monitor the service environment, diagnosing faults within the cloud infrastructure and delivering detailed technical reports.
Collaboration: Work as a core member of the DevOps and Infrastructure teams to ensure seamless environmental upgrades and stability.Essential Skills Cloud Infrastructure: Deep hands-on experience with AWS.
Orchestration: Proven expertise in Kubernetes and containerized environments.
Automation & Scripting: Strong proficiency in Python, Bash, or PowerShell.
CI/CD Tooling: Expert knowledge of Jenkins and Concourse.
Performance Testing: Extensive experience writing test strategies and using tools such as JMeter, K6, Postman, or Swagger.
Infrastructure as Code: Solid experience with Ansible.
Observability: Proficiency with monitoring and logging stacks (Prometheus, Grafana, and ELK).
Testing Philosophy: A background in both manual testing and automated performance validation. 6 Months Contract + extension | £600 per day (Inside IR35) |Remote working Please note active SC Clearance is needed for the role If this seems of interest then please apply directly to the AD or send your CV to Randstad Technologies is acting as an Employment Business in relation to this vacancy

DevOps Engineer (Performance Testing) 6 Months Contract + extension £600 per day (Inside IR35) Remote working Please note active SC Clearance is needed for the role A leading global consultancy is looking for an experienced hybrid devOps and Performance specialist to superhead critical national infrastructure projects. You will essentially ensure the resilience and scalability of a massive cloud-native environment. This is a high-visibility role where you will bridge the gap between infrastructure stability and rigorous performance validation. Key Responsibilities Infrastructure & CI/CD: Design, build, and maintain robust CI/CD pipelines to automate deployment cycles.
Performance Engineering: Lead the charge on system reliability by executing complex performance test runs, identifying bottlenecks, and implementing upgrades.
System Integrity: Proactively monitor the service environment, diagnosing faults within the cloud infrastructure and delivering detailed technical reports.
Collaboration: Work as a core member of the DevOps and Infrastructure teams to ensure seamless environmental upgrades and stability.Essential Skills Cloud Infrastructure: Deep hands-on experience with AWS.
Orchestration: Proven expertise in Kubernetes and containerized environments.
Automation & Scripting: Strong proficiency in Python, Bash, or PowerShell.
CI/CD Tooling: Expert knowledge of Jenkins and Concourse.
Performance Testing: Extensive experience writing test strategies and using tools such as JMeter, K6, Postman, or Swagger.
Infrastructure as Code: Solid experience with Ansible.
Observability: Proficiency with monitoring and logging stacks (Prometheus, Grafana, and ELK).
Testing Philosophy: A background in both manual testing and automated performance validation. 6 Months Contract + extension | £600 per day (Inside IR35) |Remote working Please note active SC Clearance is needed for the role If this seems of interest then please apply directly to the AD or send your CV to Randstad Technologies is acting as an Employment Business in relation to this vacancy

• Aws Networking
• Infrastructure
• You are pioneering and innovative and want to be part of the cutting-edge and disruptive crypto currency world
• You are eager to learn new knowledge in both financial and technical fields
• You thrive in a non-hierarchical organization with a casual working environment
• You are flexible and dedicated

Team / Role

As a Platform Engineer, you will:

• Act as infrastructure SME for a 24x7x365 globally distributed ethical web scraping function, supporting a multi region high frequency operation
• Be able to proactively analyze, drive, and own, performance and process improvements along all parts of the chain
• Collaborate closely with development team in terms of architecture/prioritization
• Liaise closely and collaboratively with central infrastructure team, in terms of common infrastructure/improving standards across the estate
• Work effectively in a global multi-cloud set up, in terms of initiating/managing relationships, evaluation/onboarding of new providers, and improving internal processes in line with best-of-breed industry practices
• Be a Linux/network stack expert and utilise that knowledge in the context of tuning/optimization and production support
• Support the platform during business hours, and out-of-hours as part of a rota, and proactively chase ways to reduce/design out manual support overhead

Required skillset

• Bachelor’s degree in Computer Science, Software Engineering or a STEM subject from a recognised university
• Minimum 2 years of solid working experience in an infrastructure, DevOps, or Platform engineer role
• Production experience in a global cloud environment. Demonstrable AWS and strong networking experience in a multi-region and/or multi-cloud set up is essential.
• Demonstrable basic development or scripting experience in one or more of the following languages: Bash, Python, Java, C#, Rust, Excel VBA
• Solid Linux / network stack knowledge, as well as optimization/tuning

Nice to haves

• Containerization (Docker / Kubernetes) in a production environment
• Monitoring tools in a production environment (Prometheus / Grafana / ELK stack / Splunk)
• IaC tooling (Terraform, Ansible etc)

To find out more about Huxley, please visit (url removed)

Huxley, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy Registered office 8 Bishopsgate, London, EC2N 4BQ, United Kingdom Partnership Number OC(phone number removed) England and Wales

Job title DevSecOps Engineer

Location: Hampshire/Hybrid (2 days per week on site)
Salary: 90k - 100k plus 6 % bonus

Candidates must be willing and eligible to go through SC security clearance for this role

Role Summary:

I am looking for a DevSecOps Engineer for a UK-based technology company that develops cutting-edge solutions for defence, security, and intelligence customers. They combine engineering, scientific research, and consultancy to tackle complex problems where technology protects what matters most.

This is your chance to work at the sharp end of UK defence solving complex, real-world challenges where security, resilience and innovation are essential for mission-critical projects. This is a fantastic opportunity to push boundaries, shape technical direction, and deploy cutting-edge solutions across cloud, AI/ML, and secure systems.

Responsibilities:

• Driving end-to-end DevSecOps best practice across the SDLC
• Building and optimising CI/CD pipelines & deployment automation
• Applying SRE principles to improve uptime and reliability
• Working closely with engineers, architects & stakeholders to deliver secure systems
• Coaching teams and influencing DevSecOps maturity across programmes
• Supporting live systems and solving complex operational challenges

Expereince Required:

Cloud & Platforms

• AWS (Azure/GCP a bonus)

DevSecOps & Automation

• CI/CD (GitLab or similar)
• Infrastructure as Code (Terraform, Ansible, Puppet)
• Scripting / automation (Python, Bash, Rust etc.)

Containers & Architecture

• Docker, Kubernetes
• Microservices / APIs / event-driven systems

Security & Observability

• Vulnerability scanning, IDAM, secure networking
• Tools like Prometheus, Grafana, ELK

What makes this role different:

• Work on cutting-edge defence challenges (DevSecOps + MLOps + secure cloud)
• Influence technical direction, not just delivery
• Solve problems like securely updating deployed equipment in the field
• Be part of a culture that values curiosity, innovation, and continuous improvement

Who this role suits:

• DevSecOps Engineers ready to step into a more impactful, strategic role
• Engineers who enjoy complex environments and meaningful work
• People who want to push the boundaries of what’s possible in secure systems

If you are interested in this role or wish to apply, please feel free to submit your CV.

Job title: Senior Software Engineer in Test (D)

Location: Manchester

Duration: 11 Months (rolling)

Hourly rate: 57.00ph INSIDE IR35 (Via Umbrella Solutions)

POSITION DESCRIPTION:

A Senior Software Engineer in Test with a passion for quality, and proven experience of automated software testing, is required for a variety of digital projects being delivered for Luxury Automotive client based in Manchester.

We are looking for great engineers who have a passion for innovative problem solving, quality-first coding and practicing Continuous Integration.

Would you thrive in an exciting, dynamic and creative start-up environment, but also enjoy the security, resources and influence of an established and successful organisation?

Would you excel within a world-class and passionate team that loves what they do?

Are you passionate about mentoring and sharing your skills with fellow engineers?

You will form part of a collaborative, iterative and agile process in a multi-disciplined team helping deliver best in class digital solutions.

This role provides a unique opportunity to help support and grow an entirely new software development capability within client

Reporting to the Principal Software Engineer in Test and working closely with other multi-disciplined engineers, you will be a valued member of the Global Digital Development Centre team, consistently delivering to challenging business objectives, with a focus on testability, robustness, security and performance for exciting new projects.

You will work on real projects alongside experienced engineers and will be expected to take on some mentoring and coaching of less experienced engineers in the lab as well as contributing to process improvements in the lab.

Key Responsibilities

• Define and implement testing for cloud systems, including platform and APIs in an agile manner
• Implement testing frameworks and where required utilising automation tools
• Support issue investigation and resolution
• Work closely with the SRE team to develop strategies to meet required SLAs and SLOs
• Define testing quality stages and gates within the software development process
• Define and Implement testing and release process for cloud systems
• Implement tests stages in pipelines, testing tool configuration, and scripting where required to implement the test strategy and processes
• Set quality goals and measurables for the system, devise and ensure the system meets these goals
• Establish a culture of maintaining continual testing and continual quality in our systems
• Line management for a junior software developer in test

Skills

Our Senior Software Engineers in Test should have:

• 5+ years experience in automated software testing in an agile and DevOps culture, with deep knowledge of the STLC and a real passion for quality
• Strong experience with tools such as Robot, Selenium, Post Man or Cypress

We are keen to speak to people who also have the following skills:

5+ years experience developing and testing bespoke built enterprise scale cloud-native applications

5+ years experience with Java, Python or another OO language

Experience with software quality tools such as SonarQube

Experience with relational database technologies such as MySQL or similar

Experienced advocate for practices such as Test Driven Development and Pair Programming

Experience with Microservices architectures, RESTful APIs and message queues

Strong programming skills

Experience with source code management and version control (Git/GitHub/GitLab)

Experience with modern CI/CD tools and techniques

Previous involvement in all stages of the software delivery lifecycle

Passion for mentoring and technical coaching of developers

Excellent verbal and written communication skills

The following skills and experience are nice to have:

Experience in BDD and creating tests using Gherkin syntax

Experience working with observability and monitoring tools such as DataDog, ELK, Prometheus, Grafana

Experience with Kubernetes or other cloud infrastructure (Google Cloud Platform, AWS, Azure)

Familiarity with polyglot persistence and experience with a NoSQL database engine (Mongo, Neo4j, etc)

If you want to know more about this exciting opportunity please review and APPLY NOW

+6 months + +Fully remote working +SC cleared - must hold current active clearance +Sole British nationals only - due to nature of the project Skills: +AWS +Kubernetes +Public Sector experience +Testing experience - can set the Testing process up from beginning to end and to be able to own it We're looking for an experienced DevOps Tester, this is a pivotal role in maintaining critical national infrastructure where scalability and resilience are essential. We're looking for a highly skilled DevOps engineer with a strong background in testing (including APIs). The ideal candidate should be self-motivated and results-driven, capable of thriving in an Agile team. You'll need to be comfortable with Confluence for documentation and Jira for project tracking and story management. Your main responsibility will be to develop and structure a comprehensive test framework. This includes creating approaches and plans, gaining approval for those approaches, and ultimately delivering a complex set of functional and performance tests for software components running within an AWS multi-account model. You will be working alongside client teams and supporting, as required, in a 3rd line capacity. Key technologies you'll be working with include Vault, Consul, Kubernetes, various AWS services (Compute, Identity), Prometheus for monitoring, ELK, Jenkins for CI/CD, and scripting languages such as Python, Ansible, and/or Bash. Knowledge of proxies and firewalls, including Fortinet and Palo Alto, would be an advantage. If you'd like to discuss this DevOps Tester in more detail, please send your updated CV to (url removed) and I will get in touch.

£40000 - 60000 GBP

Hybrid WORKING

Location: Central London, Greater London - United Kingdom Type: Permanent

Site Reliability Engineer

Level: Mid-Senior

Location: Gloucester (Hybrid)

Function: Site Reliability Engineering / DevOps

Salary £40,000 - £65,000 (DOE) + bonus and benefits

About the Role

Our client operates at the sharp end of national security and digital intelligence, delivering mission-critical technology across highly sensitive environments. Their Gloucester-based team is scaling, driven by increasing demand from government and defence clients.

This is a Site Reliability Engineering role with real impact. You are not maintaining low-value ops processes. You are engineering reliability into systems that matter, using automation, tooling, and strong software principles to reduce manual intervention and improve performance at scale.

What You’ll Be Doing

• Supporting and improving critical services that underpin mission-facing applications
• Driving automation to eliminate repetitive operational work and reduce human intervention
• Instrumenting systems with monitoring and observability tooling, using data to improve reliability and performance
• Working closely with engineering teams to embed best practices in system design and architecture
• Diagnosing and resolving complex incidents across the full technology stack
• Contributing to a broader SRE / DevOps community, sharing knowledge and improving standards

Ideal Background

• Experience in software engineering, ideally with Java and web technologies (JavaScript, HTML)
• Strong understanding of cloud infrastructure (AWS, Azure, or OpenStack)
• Solid Linux and/or Windows command line experience (Bash, PowerShell)
• Exposure to distributed systems, microservices, and containerisation (Docker)
• Experience with monitoring and logging tools (e.g. ELK stack)
• Familiarity with databases such as Elasticsearch or MongoDB
• Experience with CI/CD or configuration management tools (Chef, Puppet)
• Proven ability to troubleshoot production issues across infrastructure and application layers
• Understanding of Agile environments and tooling (e.g. Jira)

What You’ll Receive

• £40,000 - £65,000 base salary depending on experience
• Hybrid working model with flexibility built in
• Opportunity to work on high-impact, secure programmes with real-world outcomes
• Access to complex engineering challenges not typically found in commercial environments
• Strong internal engineering culture with a focus on continuous improvement and innovation

Who Should Apply

• Engineers who want to move beyond traditional operations into true SRE
• Candidates who enjoy solving complex reliability and scalability challenges
• Individuals comfortable working in secure, high-trust environments
• People who value impact, ownership, and engineering depth over surface-level delivery

Clearance & Eligibility

Due to the nature of the work, candidates must be eligible for UK security clearance. This typically requires UK nationality or long-term residency.

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Job Overview
Java (Kotlin) Developer (Agile, Test-Driven) - VP
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.

Equities Tech
Equities Technology at Citi is undertaking a bold, multi-year transformation to build a best-in-class global platform across execution, prime, clearing and cross-product margining. We are re-engineering our technology estate to achieve world-leading performance and resiliency, enabling new capabilities in advanced execution, global market connectivity, and modernised post-trade, clearing and margin processes. 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 Equities technology at Citi.

Prime Brokerage Tech
Prime Brokerage Technology provides solutions that underpin the operations of our clients and traders that provide the foundation of our Prime Finance business. This is an area of great opportunity and is a major growth target for Citi - with technology providing the key to unlock this potential.

Responsibilities Include (but not limited to):

• Ownership and delivery on a variety of components (Java/Kotlin) within the Core Prime Brokerage platform. Hands-on Development.
• Provide technical leadership for an agile development team, championing best practices in Continuous Integration and Continuous Deployment (CI/CD). Foster a culture of quality through developer-led automated testing initiatives. Drive continuous improvement in SDLC, agile and DevOps processes using key performance indicators, including DORA metrics, to enhance team efficiency and software delivery.
• Lead design, planning and estimation discussions within the team and with partners from across the department along with business stakeholders.
• Conduct high-level system analysis and architecture design, ensuring alignment with business requirements, technical standards and the overall architecture blueprint.
• Facilitate requirement gathering and translate complex business needs into technical specifications.
• Oversee the creation and maintenance of project and technical documentation.
• Identify and mitigate risks throughout the SDLC, proposing solutions to complex problems.
• Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation.
• Oversee production support processes, collaborating with operations and business stakeholders. Analyze issue patterns to drive improvements. Guide documentation efforts, maintain on-call rotations and lead post-mortems. Lead efforts to resolve root-causes and enhance performance, scalability, and reliability.
• Provide technical leadership and serve as advisor or coach to mid-level developers, analysts and grads.

Technical Experience:

• Java & Test-Driven Development are essential.
• Experience in any number of additional technologies (listed below) is advantageous:
  • Kotlin
  • Cloud Technologies (Kubernetes, Open Shift)
  • Messaging Technologies (Kafka, Solace, TIBCO)
  • Database / Data Store / Data Query Technologies (SQL Server, Trino, Mongo, S3)
  • Observability Technologies (OpenTelemetry, Elastic Stack / ELK, Grafana)

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.

About Man Group

Man Group is a global alternative investment management firm focused on pursuing outperformance for sophisticated clients via our Systematic, Discretionary and Solutions offerings. Powered by talent and advanced technology, our single and multi-manager investment strategies are underpinned by deep research and span public and private markets, across all major asset classes, with a significant focus on alternatives. Man Group takes a partnership approach to working with clients, establishing deep connections and creating tailored solutions to meet their investment goals and those of the millions of retirees and savers they represent.

Headquartered in London, we manage $227.6 billion* and operate across multiple offices globally. Man Group plc is listed on the London Stock Exchange under the ticker EMG.LN and is a constituent of the FTSE 250 Index. Further information can be found at

* As at 31 December 2025

The Role

As a Quant Developer at Man Group you will be part of one of our flagship teams in Man’s systematic trading arm - Man AHL. The team works hand-in-hand with Quant Researchers focusing on equity market neutral models. Your challenges will be varied, and will involve building new alphas and new trading strategies.

The Team

Quant Developers at Man Group are all part of our broader technology team, members of a group of over sixty individuals representing eighteen nationalities. We have varied backgrounds including Computer Science, Mathematics, Physics, Engineering – even Classics - but what unifies us is a passion for technology and writing high-quality code.

Our developers are organised into small cross-functional teams, with our engineering roles broadly of two kinds: “Quant Platform Developers” otherwise known as our “Core Techs”, and “Quant Developers” which we often refer to as “Sector Techs”. We use the term “Sector Tech” because some of our teams are aligned with a particular asset class or market sector. People often rotate teams in order to learn more about our system, as well as find the position that best matches their interests.

Our Technology

Our systems are almost all running on Linux and most of our code is in Python, with the full scientific stack: numpy, scipy, pandas, scikit-learn to name a few of the open-source libraries we use extensively. We implement the systems that require the highest data throughput in Java and C++.

We use Airflow for workflow management, Kafka for data pipelines, Bitbucket for source control, Jenkins for continuous integration, Grafana + Prometheus for metrics collection, ELK for log shipping and monitoring, Docker and Kubernetes for containerisation, OpenStack for our private cloud, Ansible and Terraform for architecture automation, and Slack for internal communication. We heavily utilise ArcticDB () our in-house developed DataFrame Database. Our technology list is never static: we constantly evaluate new tools and libraries.

Technology and Business Skills

At AHL we strive to hire only the brightest and best and most highly skilled and passionate technologists.

Essential

• Exceptional technology skills; recognised by your peers as an expert in your domain
• A keen interest and understanding of financial markets and instruments
• A proponent of strong collaborative software engineering techniques and methods: agile development, continuous integration, code review, unit testing, refactoring and related approaches
• Strong knowledge of Python
• Proficient on Linux platforms with knowledge of various scripting languages
• Experience of data analysis techniques along with relevant libraries e.g. NumPy/SciPy/Pandas
• Relevant mathematical knowledge e.g. statistics, asset pricing theory, optimisation algorithms

Advantageous

• Experience of front office quantitative software development e.g. in a hedge fund or investment bank
• Experience of web based development and visualisation technology for portraying large and complex data sets and relationships
• Experience of machine learning techniques, natural language processing and related libraries and frameworks e.g. scikit-learn, Tensorflow

Personal Attributes

• Strong academic record and a degree with high mathematical and computing content e.g. Computer Science, Mathematics, Engineering or Physics from a leading university
• Craftsman-like approach to building software; takes pride in engineering excellence and instils these values in others
• Demonstrable passion for technology e.g. personal projects, open-source involvement
• Intellectually robust with a keenly analytic approach to problem solving
• Self-organised with the ability to effectively manage time across multiple projects and with competing business demands and priorities
• Focused on delivering value to the business with relentless efforts to improve process
• Strong interpersonal skills; able to establish and maintain a close working relationship with quantitative researchers, traders and senior business people alike
• Confident communicator; able to argue a point concisely and deal positively with conflicting views

Working Here

Man Group has a small company, no-attitude feel. It is flat structured, open, transparent and collaborative, and you will have plenty of opportunity to grow and have enormous impact on what we do. We are actively engaged with the broader technology community.

• We host and sponsor London’s PyData and Machine Learning Meetups
• We open-source some of our technology. See
• We regularly talk at leading industry conferences, and tweet about relevant technology and how we’re using it. See

We’re fortunate enough to have a fantastic open-plan office overlooking the River Thames, and continually strive to make our environment a great place in which to work. We believe that agile working allows us to deliver the best business outcomes for our clients and investors as well as having a positive impact on life / work balance and the wellbeing of our staff. We are simultaneously committed to “levelling the playing field” and believe that agile working promotes inclusivity across teams, regions and business units.

• We organise regular social events, everything from photography through climbing, karting, wine tasting and monthly team lunches
• We have annual away days and off-sites for the whole team
• As well as PC’s and Macs, in our office you’ll also find numerous pieces of cool tech such as light cubes and 3D printers, guitars, ping-pong and table-football, and a piano

We offer competitive compensation, a generous holiday allowance, various health and other flexible benefits. We are also committed to continuous learning and development via coaching, mentoring, regular conference attendance and sponsoring academic and professional qualifications.

Inclusion, Work-Life Balance and Benefits at Man Group
You’ll thrive in our working environment that champions equality of opportunity. Your unique perspective will contribute to our success, joining a workplace where inclusion is fundamental and deeply embedded in our culture and values. Through our external and internal initiatives, partnerships and programmes, you’ll find opportunities to grow, develop your talents, and help foster an inclusive environment for all across our firm and industry. Learn more at .

You’ll have opportunities to make a difference through our charitable and global initiatives, while advancing your career through professional development, and with flexible working arrangements available too. Like all our people, you’ll receive two annual ‘Mankind’ days of paid leave for community volunteering.

Our comprehensive benefits package includes competitive holiday entitlements, pension/401k, life and long-term disability coverage, group sick pay, enhanced parental leave and long-service leave. Depending on your location, you may also enjoy additional benefits such as private medical coverage, discounted gym membership options and pet insurance.

Equal Employment Opportunity Policy

Man Group provides equal employment opportunities to all applicants and all employees without regard to race, color, creed, national origin, ancestry, religion, disability, sex, gender identity and expression, marital status, sexual orientation, military or veteran status, age or any other legally protected category or status in accordance with applicable federal, state and local laws.

Man Group is a Disability Confident Committed employer; if you require help or information on reasonable adjustments as you apply for roles with us, please contact .

DevOps SME (AWS) 6 Months Contract | £60 to £80 per hour (Inside IR35) Remote Working \*Active SC Clearance is needed\* A top tier pioneering firm is looking for an experienced devOps SME to support a critical initiative for a UK Public Sector end-client. This is a pivotal role within a high-performing Agile environment, focusing on the delivery of a secure, scalable, and automated DevOps toolchain. As an SME, you will not only be responsible for technical execution but will also provide the architectural foresight needed to maintain service stability and drive process optimisation. You will bridge the gap between complex engineering and business impact, ensuring that all cloud-native solutions are robust, secure, and performant. Key Responsibilities Create and manage automated scripts (using tools like Terraform or Ansible) so that complex computer systems can be set up quickly, reliably, and identically every time. Watch for signs that the system is slowing down or running out of space, and fix these issues before they cause a crash or failure. Ensure that security checks are a fundamental part of the build process from the very beginning, rather than an afterthought, to keep data and systems safe. Build and look after the automated "conveyor belt" that tests and moves new software from the developer's desk to the live environment quickly and without errors. Act as a mentor to the wider team, guiding DevOps strategy and influencing the adoption of modern standards across the delivery environment.Essential Skills Hands on experience with AWS Solid experience with terraform and Ansible IaC CICD - Advanced experience with Jenkins, GitLab CI, or GitHub Actions. Familiarity with monitoring and logging stacks, including Prometheus, Grafana, and ELK Strong proficiency in Docker and Kubernetes for application packaging and orchestration. Proven track record of operating as a technical lead or SME within UK Public Sector projects \*Candidates must hold active SC Clearance\* 6 Months Contract Inside IR35 | Remote Working | £60 to £80 per hour (Inside IR35) If you are an experienced devOps engineer with active SC clearance searching for a new challenging role then this could be the perfect opportunity for you. If the above seems of interest then please apply directly to the AD or send your CV to Randstad Technologies is acting as an Employment Business in relation to this vacancy

+6 months + +Inside IR35 +£575 - £610 a day +SC cleared role - sole British nationals only due to nature of the project +Fully remote working CBSbutler are supporting a large organisation delivering a critical UK public sector programme and are looking for an experienced DevOps Engineer / DevOps SME to strengthen platform delivery, automation and secure release capability. What you'll be doing Designing and improving CI/CD pipelines to enable reliable, repeatable deployments Implementing and maintaining Infrastructure as Code (IaC) for automated environment provisioning Supporting containerised platforms and orchestration to improve scalability and resilience Embedding security and compliance controls into engineering workflows (DevSecOps) Driving observability improvements across monitoring, logging and alerting Advising engineering teams on DevOps best practice and helping remove delivery bottlenecks Essential experience Typically 5-10+ years in DevOps / systems engineering / software engineering Strong hands-on Infrastructure as Code (IaC) (e.g., Terraform, Ansible, CloudFormation) Containers & orchestration: Docker + Kubernetes Cloud platform depth: AWS / Azure / GCP (networking, compute, storage, security) CI/CD tooling: Jenkins, GitLab CI, GitHub Actions, CircleCI (or similar) Monitoring & logging: Prometheus, Grafana, ELK stack (or equivalent) DevSecOps: integrating security into pipelines and delivery (e.g., SonarQube, Snyk, OWASP practices) If you'd like to discuss this DevOps Engineer role in more detail, please send your updated CV to (url removed) and I will get in touch

We are hiring a skilled back-end Python Developer to join a high-performing technology team at a top-tier investment bank. You’ll be instrumental in delivering a greenfield system monitoring and performance analysis tool for global trading platforms – a solution that will provide critical insights into system health and behavior across the trading stack. This is a chance to build something from scratch, with full ownership of backend components, data ingestion, and real-time analytics in a Linux-based environment. Key Responsibilities: 1. Design and develop robust backend services and APIs in Python to power a real-time trading system monitoring tool. 2. Build scalable data pipelines to ingest, process, and analyse metrics from various trading infrastructure components. 3. Implement logic to detect anomalies, track performance, and surface actionable insights for developers and traders. 4. Ensure stability, performance, and security of backend systems in a Linux production environment. 5. Collaborate with front-end developers (ReactJS), infrastructure teams, and end users to deliver a complete solution. 6. Contribute to system architecture, technical design, and long-term platform strategy. Requirements: 1. Strong experience with Python for backend/API development. 2. Solid experience developing and deploying applications in Linux environments. 3. Experience with system monitoring, logging, or performance analytics (e.g., Prometheus, Grafana, ELK, custom tooling) is a plus. 4. Knowledge of distributed systems, data processing, or real-time event handling is desirable. 5. Familiarity with trading systems or financial infrastructure is advantageous but not required. 6. Strong communication skills and ability to work in cross-functional teams.

Exciting opportunity at one of the fastest growing financial services firms around the world. They offer prime brokerage, clearing and financing across traditional and digital assets, and are now looking to hire world-class engineers to help build on their success.

Responsibilities will include:

• Automate infrastructure and operational workflows using IaC with Terraform and AWS CDK.
• Develop & optimize CI/CD pipelines to improve software delivery for large-scale distributed systems using Amazon CodeBuild, GitHub Actions & Terraform Enterprise
• Implement and maintain observability solutions to establish real-time monitoring and proactive incident response using Datadog and AWS CloudWatch
• Ensure high availability and performance of relational and time-series databases (PostgreSQL/QuestDB), including replication, failover strategies, and query optimization

Skills & Experience Required

• Extensive experience with AWS, including EC2, ECS, S3, RDS, Lambda, MWAA, API Gateway, Route53, SSM, EFS, Backup, DynamoDB, Cloudfront, VPC, CodeBuild, CodePipeline, CodeArtifact, Config, Elasticache, and networking components in a highly available environment.
• Strong Python programming & automation skills in Python
• Proven experience with event streaming (i.e. Kafka/Kinesis)
• Deep understanding of distributed systems architecture, fault tolerance, disaster recovery, and performance tuning
• Hands-on experience with observability and monitoring tools (e.g. Datadog, ELK, CloudWatch)
• Proven track record managing infrastructure with Terraform or AWS CDK
• Strong background in incident management, system reliability, and operational leadership, with experience conducting root cause analysis & implementing reliability improvements

Benefits & Incentives

• Build and scale mission-critical systems that power global financial markets
• Work in a technology-driven culture focused on automation, performance, and reliability
• Contribute to shaping the future of financial technology
• Engage with cutting-edge AWS, SRE, and observability tools in a fast-moving environment

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 feel you are suitable for this role, drop me an email or give me a call!

Jack Peck
[e] jack.peck@oxfordknight.co.uk
[t] +44 20 3745 6537
linkedin.com/in/jack-peck-448a70131

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.

About the Position:
We are looking for an industry wide Senior Systems Architect (Infrastructure) who can provide leadership and direction for Change-The-Bank (CTB) electronic trading infrastructure initiatives covering all technologies (in this specific domain) for Rates.
The role sits within Citi’s Global Markets: High Performance Architectures - Infrastructure (HPAi) group. This team is responsible for all electronic trading infrastructure architecture across all markets globally for the firm. It is composed of low latency Subject Matter Experts (North America, EMEA), Systems Architects (both regional and asset class aligned) and an aligned initiative management function (e.g. Technical Project Manager). Technology is key to our business; this role will require you to drive innovation and technology adoption in a large multi-faceted and complex environment. This Markets-Tech “business aligned tech” resource will collaborate with ICG-Markets “the business”, CTI “Enterprise Infrastructure”, and CISO “Security” teams driving technical architecture and engineering of CTB and End of Vendor Support (EoVS) initiatives where we choose to innovate.

What you will do (but not limited to)
Reporting to the head of HPAi, the Systems Architect will be responsible for ensuring best in breed technology architecture and engineering are in alignment with business requirements. This will be done in collaboration with CISO and other teams and resource aligned to HPAi who represent Enterprise and CISO priorities and standards.
Active collaboration with all parties is required to be successful. The resource should be able to effectively collaborate with the Markets-Tech Electronic Trading organization (our clients), steer other technology organizations directly or through influence, and love rolling up their sleeves and working as an individual contributor.
The resource will leverage the full strength of the supporting non-ICG technology organizations (dedicated and non-dedicated to HPAi).
The role is very broad requiring a resource that is not afraid to do new things and be challenged on a regular basis with a can-do attitude and an engineering mindset.
You will show a deep desire to drive results and an unquenchable desire to understand how technology primitives work (and how to abuse them).
Low Latency Trading - Rates and Cross Markets, domain specific technology is required (solid knowledge for as many of the following as possible):

The Technologies:

• Compute (Linux, CoreOS, Tuning, kernel bypass technologies, core dump analysis)

• Network (R&S, cut-through, Multicast, SDN, BGP, L1-L3, PCAP analysis)

• HPC File Systems (Lustre, GPFS, Weka, DDN, Ceph)

• Interconnects (InfiniBand, Slingshot, PCIe, NVLink, UALink, UPI, RoCE)

• HW (Server, FPGA, GPU, Memory, Cache, over clocking, cooling, ASIC, Quantum, NUMA)

• DevOps (OpenShift, Kubernetes, DevOps, Prog[Python, Perl, Shell], CI/CD)

• Programming (C, C++, Java, Rust, VHDL, Verilog)

• Time Sync (PTP, NTP, GPS, White Rabbit, SyncE)

• Wave (RF, Millimeter, Microwave, DWDM, Photonics)

• Storage (I/O, NAS, SAN, Object Store, SDS)

• Database (relational, columnar, graph, NoSQL, architecture, tuning)

• Monitoring (SPANs, TAPS, OEO, Packet Brokers, Corvil, SNMP, FIX, Logs, ELK, Open Telemetry, Grafana, Promethius)

• Messaging (TibRV, Solace, Aeron, ZeroMQ, Kafka, Multicast, Market data (TCP/UDP), Tibco, Exegy/Vela)

• Load Balancers (HW, SW)

• Security (Firewalls, PKI, TLS, IDS, Optical Encryption, AD, LDAP)

• Connectivity (WAN, Lucera, cross-connects, ECX, venue, client)

• Colo / Datacenter (Power, Space, Cage, Rack, Cabinet, Design)

• Excel (for advanced frameworks, data analysis)

Required:

• Deep knowledge of operating system fundamentals - hyper focus on Linux (REL, CoreOS)

• Understanding of OSI model and TCP and UDP network protocols

• Experience with Python and data libraries

• Fluency with the Unix command line and shell scripting

• Practical experience with modern Linux systems and systems programming concepts like C, IPC mechanisms, virtual memory, and process life cycle

• Strong troubleshooting skills and knowledge of profiling/debugging tools such as gdb, perf, DTrace, SystemTap

• Can understand, interpret, and improve application performance via system tuning

• Thorough understanding of modern computer architecture - modern x86 AMD and Intel cache hierarchies as an example.

• Kernel-bypass technology knowledge (such as Solarflare OpenOnload / TCPDirect / ef_vi, RoCE, DPDK)

• Prior experience in a similar Site Reliability Engineering (SRE), DevOps, distributed computing, systems engineering/administration

• Ability to context switch to work on several projects at once

• Knowledge of JIRA, SCRUM, Sprints

• Low Latency Trading - Rates and Cross Markets, domain specific technology is would be highly beneficial

The Details:

• Ingress/plan/execute/manage technical initiatives to make our electronic trading systems faster, more adaptable stable and maintainable aligned to HPAi standards.

• Communicate ideas, requirements, and results across disparate teams.

• This position will support technical populations (Rates), partnering with leaders to understand their challenges and design and execute solutions to solve them.

• Communicating business and IT requirements to external vendors and internal technical teams

• To succeed in this role, you must enjoy working independently and collaborating, being a hands-on contributor, learning on the fly and embrace change - rapid pace.

• You must be able to understand full-stack electronic trading technologies and engage effectively in a very technical manner with other SMEs, systems architects, the business (at times), Markets-Tech, and enterprise infrastructure organizations (CTI/CISO).

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.

Education:
Degree Educated ideally in a Comp science or engineering field or experience operating in a similar role.

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.

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:

Senior DevOps Engineer - Cloud Platform & Site Reliability Location: Nottingham, UK | Team: LSEG Risk Intelligence Engineering

Are you passionate about building scalable, secure, and resilient platforms that power global Risk Intelligence products?

We’re looking for a Senior DevOps Engineer to help drive innovation, implement modern DevOps practices, and contribute to the evolution of our cloud-native infrastructure.

WHAT YOU’LL BE DOING:

As a Senior DevOps Engineer, you’ll play a key role in designing, building, and maintaining the infrastructure and automation that powers our platforms:

• Automate full-stack infrastructure using Terraform, CloudFormation, and GitOps workflows
• Build and maintain CI/CD pipelines with GitLab CI to enable fast, secure, and reliable software delivery
• Deploy and manage Kubernetes workloads using Amazon EKS and Istio Service Mesh for service discovery, traffic management, and observability
• Implement monitoring and alerting to ensure high availability, performance, and reliability
• Collaborate with cross-functional teams to ensure infrastructure aligns with development and business goals
• Continuously improve systems through automation, performance tuning, and process optimization
• Contribute to our DevOps culture, sharing knowledge and best practices across the team

WHAT YOU’LL BRING:

• Cloud expertise in AWS (EC2, Lambda, RDS, S3, VPC, IAM, CloudWatch, etc.)
• Infrastructure as Code: Terraform, CloudFormation
• Container orchestration: Kubernetes (EKS), Istio Service Mesh
• CI/CD tooling: GitLab CI (preferred), Jenkins, Bitbucket
• Scripting & automation: Bash/Shell, Python
• Security best practices: IAM, KMS, encryption in transit/at rest
• Monitoring & observability: Prometheus, Grafana, ELK, or similar
• Agile & DevOps culture: GitOps, SRE principles, Agile methodologies
• 4+ years in DevOps or platform engineering roles.
• Proven experience building and operating cloud-native platforms
• Strong communication and collaboration skills.
• A passion for automation, developer enablement, and continuo

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.

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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.

The Lead Java Developer is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to lead applications systems analysis and programming activities.

Responsibilities:

• Lead delivery of Real-Time and On-Demand Risk enhancements for the Credit Business by partnering directly with London-based trading, MQA, Market Risk, and technology teams.
• Own the full development lifecycle: architecture, design, implementation, automated testing strategies, release execution, and ongoing production support.
• Drive alignment of RT/OD workflows with EOD Risk strategy, ensuring functional parity, reconciliation, and controlled cutover.
• Lead adoption and build-out of RT/OD capabilities on strategic risk platform, including integration of new analytics, workflows, and risk datasets.
• Deliver significant performance improvements through optimized risk calculation strategies.
• Guide the migration of compute workloads to AWS, implementing best practices for scalability, throughput, resiliency, and cost efficiency.
• Collaborate actively with NAM and APAC teams in a follow-the-sun model to improve delivery velocity, reduce operational risk, and ensure rapid triage of production incidents.
• Provide user-facing updates, demos, documentation, and education to promote adoption and ensure successful rollout of new capabilities.
• Lead root cause analysis on production issues, drive long-term stability improvements, and strengthen monitoring and observability across the platform.

Recommended Experience:

• Strong experience in Core Java, J2EE, Spring Framework
• Exposure to Python scripting and data analysis
• Experience in fast moving Capital Markets Front Office technology environment with experience in Fixed Income products
• Working knowledge of Front Office Risk calculations, especially for Credit products
• Experience in building highly scalable and distributed applications using Microservices, APIs, and Container technologies such as Docker, Kubernetes, OpenShift, etc.
• Strong expertise in messaging technologies such as Kafka, JMS, gRPC etc
• Proficient in latency measurement and performance optimization of Java based platforms with focus on JVM tuning
• Experience with observability stacks like ELK, Prometheus, Grafana, Kiali, Jaeger etc.
• Sound knowledge for persistence technologies such as relational databases, NoSQL databases, off heap storages and distributed caches
• Hands-on knowledge of Linux / Unix
• Experience working with senior Quants and Technology Managers
• Good verbal and written communication

Education:

• Bachelor’s degree/University degree or equivalent experience
• Master’s degree preferred

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 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.

Senior Software Engineer in Test Contract | Inside IR35 | £400 per day Location: Manchester (Hybrid - 2-3 days onsite per week) Contract End Date: March 2027 I'm currently working with a large, well‑established enterprise client who are continuing to grow their digital engineering capability in Manchester. They are looking to engage an experienced Senior Software Engineer in Test on a long‑term contract to support the delivery of high‑quality, scalable, cloud‑based digital platforms. This is an excellent opportunity for a senior‑level test professional to join a collaborative, agile environment where quality, automation, and engineering best practice are taken seriously. The role offers strong delivery stability with a contract running until March 2027. The Role You'll join a multi‑disciplinary digital engineering team, working closely with developers, SREs, and other engineers to embed quality throughout the software delivery lifecycle. The focus is on automation‑led testing, CI/CD integration, and driving a continuous testing culture. You will also play a role in mentoring and supporting more junior engineers in test. Key Responsibilities Define and deliver automated testing strategies for cloud‑native systems, platforms, and APIs Design, implement, and maintain test automation frameworks Embed test stages and quality gates within CI/CD pipelines Support defect investigation, root‑cause analysis, and resolution Collaborate with engineering and SRE teams to meet defined SLAs and SLOs Define testing, release, and quality assurance processes Set and track quality metrics and measurable outcomes Promote continuous testing and quality‑first engineering practices Provide mentoring and coaching to junior engineers in test Required Experience 5+ years' experience in automated software testing within agile and DevOps environments Strong understanding of the Software Testing Lifecycle (STLC) Hands‑on experience with tools such as Selenium, Cypress, Robot Framework, or Postman Strong programming capability in Java, Python, or another OO language Experience testing enterprise‑scale, cloud‑native applications Good knowledge of APIs, microservices, and distributed architectures Experience with version control systems (Git) and modern CI/CD pipelines Confident communicator with a collaborative mindset Nice to Have BDD experience and Gherkin syntax Exposure to observability and monitoring tools (Grafana, Prometheus, ELK, Datadog) Experience with Kubernetes or cloud platforms (AWS, Azure, or GCP) Experience with relational or NoSQL databases Working Pattern & Rate £400 per day (Inside IR35, via umbrella) Hybrid working: 2-3 days per week onsite in central Manchester Long‑term contract running through to March 2027If this sounds like a role you'd like to discuss, or if you'd like further details on the client, project, or interview process, please get in touch