Senior Java Engineer
London Stock Exchange Group7 months ago
London, United KingdomSenior
Responsibilities
- Design, develop, and maintain complex Java and Python applications using modern engineering practices.
- Build and integrate AI-powered features into mission-critical systems.
- Architect and enhance distributed services supporting large-scale, performance-critical index computations.
- Lead projects end-to-end from requirements and design through development, testing, deployment, and operations.
- Build and maintain automated test suites for 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.
- Establish best practices for safe, scalable, traceable, and production-ready AI deployments.
- Collaborate with Product Managers, UX, and global engineering teams.
Requirements
- 10+ years of hands-on backend software engineering experience.
- Strong algorithms, data structures, problem-solving, and scalable system design skills.
- Expertise in Core Java and Python.
- Experience building highly distributed, data-intensive systems.
- Experience with microservices, REST APIs, relational databases, CI/CD tools, DevOps automation, Docker, Kubernetes, JVM profiling, and performance optimization.
- Prior Level 3 production support experience.
- Experience developing solutions with LLMs, LangChain/LangGraph, and agentic AI frameworks.
- Preferred: experience leading or mentoring engineers.
- Preferred: financial services or financial market data experience.
- Preferred: familiarity with in-memory caching, Spring Boot, Redis, Kafka, and BDD frameworks such as Cucumber, JBehave, or Karate.
- Preferred: background as a Scrum Master or experience running Agile teams.
Benefits
- Healthcare, retirement planning, paid volunteering days, and wellbeing initiatives.
- Paid volunteering opportunities and participation in LSEG Foundation fundraising and community activities.
- Equal-opportunity workplace with reasonable accommodations for religious practices, mental health needs, and physical disabilities.
Tech Stack
Categories
About London Stock Exchange Group
London Stock Exchange Group (LSEG) provides market infrastructure, financial data, and analytics to banks, asset managers, and corporations. Its businesses span capital markets (London Stock Exchange), post-trade clearing (LCH), and information services including FTSE Russell indices and the Refinitiv data platform, funded by transaction fees, subscriptions, and licensing. Headquartered in London and publicly listed on the LSE, the group serves global customers seeking trading, clearing, benchmarks, and enterprise data solutions.