ROLE PROFILE: CDSClear is responsible for clearing Credit Default Swap (CDS) indices, single names and options across European, US and Asian markets. Risk is a core capability of the service, supporting intraday and overnight batch margin calculations, member‑facing what‑if simulations, and pricing analytics. This contract role sits within CDSClear Risk Technology, focused on the Java‑based risk platform and risk engine that delivers quantitative margin models at scale in a highly regulated environment. ROLE SUMMARY: The role is suited to experienced engineers who have worked on risk, pricing or analytics platforms in an investment bank, CCP or similar financial services environment. You will work on systems that sit at the core of the clearing service, where correctness, performance, resilience and operational control are essential You will help build and implement the platform components and execution patterns that allow quantitative risk models to run reliably in production, contributing directly to both system behaviour and overall platform direction. This is a Lead Individual Contributor (IC) role: highly hands‑on, with significant influence over design and technical direction, and an expectation of strong ownership across the end‑to‑end lifecycle of the systems you work on. Key Responsibilities • Act as a Lead Java Engineer within the CDSClear Risk Development team, contributing across all stages of the SDLC • Design, implement and evolve core risk-engine components supporting intraday and overnight batch margin calculations • Contribute to the implementation of quantitative risk models by translating analytic requirements into production‑grade system behaviour• Provide technical leadership across Risk calculation orchestration • Integration of market data, trade data, reference data and model parameters • Performance, scalability, determinism and failure handling • Own delivery of business requirements through development, testing and controlled production release • Drive evolution of the risk platform, combining incremental improvements with more substantial architectural step‑changes, while maintaining a strong focus on delivery, quality and maintainability • Collaborate with infrastructure, security and DevOps teams to deliver end-to-end solutions • Participate in third-line system support, including out-of-hours rota where required Candidate Profile / Key Skills Essential • Strong server‑side Java engineering experience (Java 11+; Java 17+ preferred) using Spring / Spring Boot • Ability to understand quantitative models and make informed implementation trade‑offs when integrating them into production systems • Practical experience contributing to or shaping a risk‑engine architecture capable of executing computationally intensive models at scale • Strong understanding of enterprise platform concerns, including:• Performance and scalability • Resilience and recovery • Auditability, controls and operational readiness • Comfortable working in a regulated / controlled environment with disciplined SDLC and production change processes • Clear communicator with the ability to influence technical decisions through expertise and collaboration • Ownership mindset, with a drive to improve quality, robustness and long‑term maintainability of the platform • An interest in modern engineering productivity approaches, including the efficient use of AI‑assisted tooling (e.g. Copilot‑style tools) to aid codebase comprehension, documentation & delivery — applied appropriately within a controlled environment Technical Environment (Indicative) • Java, Spring Boot, Maven, IntelliJ • Messaging: JMS, ActiveMQ / IBM MQ, Kafka • Linux-based server environments • CI/CD: GitLab, JUnit, Mockito, Cucumber • Git-based source control Preferred / Nice to Have • Experience working alongside C++ or other native analytics libraries • Familiarity with derivatives products, particularly credit derivatives • Exposure to cloud or hybrid environments (e.g. AWS) • Infrastructure-as-code or deployment automation (e.g. Terraform, Ansible) • Monitoring and observability tooling in enterprise environments Why This Role This role offers the opportunity to work hands‑on at the heart of a critical risk platform, contributing to systems where correctness, performance and resilience are essential. It combines deep Java engineering with technical leadership, giving scope to influence how quantitative risk calculations are executed in production and to help shape the execution model for CDSClear’s next‑generation risk platform. Career Stage: Manager London Stock Exchange Group (LSEG) Information: Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you. LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth. Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions. Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce. We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs. You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering. LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives. Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject. If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.