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From the employer's careers site First seen 2 Nov 2026

Senior Java Engineer

The employer hasn't listed a salary.

Apply on London Stock Exchange Group (LSEG)

Description

We are seeking a highly skilled and hands-on Senior 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 and 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

  • 10+ 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.

Benefits

  • Join a dynamic organisation of 25,000 people across 65 countries.
  • Be part of a team that values innovation, quality, and continuous improvement.
  • Work with a culture that encourages growth, opportunity, diversity, and innovation.

Skills

Required

Nice to have

  • 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
  • BDD frameworks
  • Scrum Master

Ready to apply?

You apply with the employer directly. Their original posting is here: https://lseg.wd3.myworkdayjobs.com/en-US/Careers/job/London-United-Kingdom/Development-Manager_R0108683-1

Apply on London Stock Exchange Group (LSEG)