# Lead Developer at LSEG

LSEG is hiring a Lead Developer in London, United Kingdom. Level rates it Little AI ●○○○; you can [apply on LSEG](https://jobsbylevel.com/go/38a85b49-240c-4836-900d-06b8f2094d03?utm_medium=ai-agent).

AI Level 1, AI centrality 32 out of 100. London, United Kingdom.

## Details

- Company: [LSEG](https://jobsbylevel.com/companies/lseg)
- AI level: AI Level 1 (score 32 out of 100)
- Location: London, United Kingdom
- Posted: April 1, 2026
- Apply: https://jobsbylevel.com/go/38a85b49-240c-4836-900d-06b8f2094d03?utm_medium=ai-agent
- Free CV review for this job: https://jobsbylevel.com/cv-review?job=lead-developer-at-lseg-74924f

## Prepare for this job

The job page lists 2 likely interview questions for this offer, with a CV checklist: https://jobsbylevel.com/jobs/lead-developer-at-lseg-74924f

## Description

Lead Java Developer Business Unit: FTSE Russell – Index Platform Company: London Stock Exchange Group (LSEG) About the Role We are seeking a highly skilled and hands - on Lead Java Engineer with AI proficiency to help build the next generation FTSE Russell Index Platform. This platform underpins the calculation and distribution of FTSE Russell’s global family of indexes and requires advanced engineering, high precision data processing, and deep collaboration across global teams. This is a deeply technical role focused on designing, building, integrating, and operationalising modern software and AI driven capabilities across internal platforms and client facing products. You will work with innovative technologies, contribute to complex algorithmic design, and drive engineering excellence in a high performance , data intensive environment. Key Responsibilities Core Engineering & Platform Delivery Design, develop, and maintain complex Java and Python applications using modern engineering practices. Build / embed AI powered features into mission critical systems. Architect and enhance services that support large scale , performance critical index computations. Collaborate with Product Managers, UX, and engineering teams globally to deliver high quality products. Lead projects end - to - end through requirements, design, development, testing, deployment, and operations. Build and maintain automated test suites to ensure performance, scalability, and security. Diagnose production issues, identify root causes, and deliver Level 3 support and fixes. Conduct peer reviews, provide technical leadership, and mentor junior engineers. Required Experience & Skills 12+ years of hands - on backend software engineering experience. Support the organisation’s AI adoption journey . Develop and enhance intelligent solutions using LLMs, LangChain / LangGraph , and agentic AI frameworks. Establish engineering best practices for safe, scalable, traceable and production ready AI deployments across internal platforms and external product suites. Strong algorithms, data structures, problem solving skills , and ability to translate business problems into scalable solutions. Good command of coding standards and Strong understanding of both high level and low level software design Expertise in: Core Java , Python Building highly distributed, data intensive systems Microservices, REST APIs RDBMS (Oracle/SQL Server/Postgres) CI/CD tools (Jenkins/GitLab), DevOps automation Docker, Kubernetes JVM profiling & performance optimisation Prior exposure to Level 3 production support. Preferred / Nice-to-Have Skills Experience leading or mentoring a team of engineers . Experience within financial services or with financial market data. Familiarity with in - memory caching, Spring Boot, Redis, Kafka. Experience with BDD frameworks such as Cucumber, JBehave , or Karate. Experience running Agile teams. What We’re Looking For A proactive , creative engineering leader who enjoys solving complex problems, working hands - on with modern technologies, and driving AI enabled innovation. If you’re passionate about building resilient, intelligent, data intensive systems that power global financial markets, we’d love to hear from you. Benefits We are looking for intellectually curious people, passionate about the bigger picture of how technology industry is evolving, ready to ask difficult questions and deal with complicated scenarios! If you are creative and a problem solver, this is the place to be as will be supporting you to fast-forward your career! We enhance each employee’s potential through personal development through a wide range of learning tools both formal and informal. LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth. Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership,

The description is cut here. Read the full offer: https://jobsbylevel.com/jobs/lead-developer-at-lseg-74924f

Source: https://jobsbylevel.com/jobs/lead-developer-at-lseg-74924f

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