Job Description

Lead Java Developer

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

About the Role

We areseekinga highly skilled andhands-onLead Java Engineerwith AIproficiencyto help build thenext generationFTSE Russell Index Platform. This platform underpins the calculation and distribution of FTSE Russell’s global family of indexes and requires advanced engineering,high precisiondata processing, and deep collaboration across global teams.

This is a deeply technical role focused on designing, building, integrating, and operationalising modern software and AIdriven capabilities across internal platforms andclient facingproducts. You will work with innovative technologies, contribute to complex algorithmic design, and drive engineering excellence in ahigh performance,data intensiveenvironment.

Key Responsibilities

Core Engineering & Platform Delivery

• Design, develop, andmaintaincomplex Java and Python applications using modern engineering practices.Build /embed AIpowered features intomission criticalsystems.

• Architect and enhance services that support large scale, performancecritical index computations.

• Collaborate with Product Managers, UX, and engineering teams globally to deliver highquality products.

• Lead projects end-to-end through requirements, design, development, testing, deployment, and operations.

• Build andmaintainautomated test suites to ensure performance, scalability, and security.

• Diagnose production issues,identifyroot causes, and deliver Level 3 support and fixes.

• Conduct peer reviews, provide technical leadership, and mentor junior engineers.

Required Experience & Skills

• 12+ years ofhands-onbackend software engineering experience.

• Support the organisation’s AI adoption journeyDevelop and enhance intelligent solutions using LLMs,LangChainLangGraph, and agentic AI frameworks.

• Establish engineering best practices for safe, scalable, traceable and productionready AI deploymentsacross internal platforms and external product suites.

• Strong algorithms, data structures,problemsolving skills, and ability to translate business problems into scalable solutions.

• Good command of coding standards and Strong understanding of bothhigh levelandlow levelsoftware design

• Expertisein:

• Core Java, Python

• Building highly distributed, dataintensive 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 ofengineers

• 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.

WhatWe’reLooking For

A proactive, creative engineering leader who enjoys solving complex problems, workinghands-onwith modern technologies, and drivingAI enabledinnovation. Ifyou’repassionateabout building resilient, intelligent,data intensivesystems that power global financial markets,we’dlove to hear from you.

Benefits

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

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

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce. You will be part of a collaborative and creative culture where we encourage new ideas and are committed to sustainability across our global business. You will experience the critical role we have in helping to re-engineer the financial ecosystem to support and drive sustainable economic growth. Together, we are aiming to achieve this growth by accelerating the just transition to net zero, enabling growth of the green economy and creating inclusive economic opportunity.

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

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

Career Stage:

Manager

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.