Senior Java Engineer

London, England, GBFull-time2026-08-28 → 2026-11-10

Core

Design, build, and operationalize high-performance Java and Python applications with embedded AI capabilities for global index calculation and distribution.

Role type

Senior IC Java Engineer (AI/ML integration)

Builds

Mission-critical index computation platforms and AI-driven financial market infrastructure

Domain

Financial markets infrastructure / High-frequency data processing

Deliverable

production ML models

Required skills

Java, Python, distributed systems, microservices, REST APIs, RDBMS, CI/CD, Docker, Kubernetes, JVM profiling, algorithmic design

Preferred skills

LLMs, LangChain, agentic AI frameworks, Spring Boot, Redis, Kafka, BDD frameworks

Technologies

LangChain, LangGraph, Jenkins, GitLab, Cucumber, JBehave, Karate, Oracle, SQL Server, Postgres

Responsibilities

Design and develop complex Java/Python applications; Architect performance-critical index computation services; Lead end-to-end projects from requirements to operations; Build automated test suites; Diagnose production issues and provide Level 3 support; Conduct peer reviews and mentor junior engineers

Seniority

Senior, hands-on IC

About London Stock Exchange Group

LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a commitment to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, handle risk and create jobs. It's how we've contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehens