Lead Developer

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.

Key Responsibilities

• 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.
• Experience with 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

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

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