Lead Java Developer – AI

Company: Synechron
Apply for the Lead Java Developer – AI
Location: Greater London
Job Description:

Synechron is looking for a highly skilled and hands-on Lead Java Engineer with AI proficiency to help build the next generation FTSE Russell Index Platform. This platform requires advanced engineering, high precision data processing, and deep collaboration across global teams.

This is a deeply technical role focused on designing, building, integrating, and operationalising modern software and AI driven capabilities across internal platforms and client facing products. You will work with innovative technologies, contribute to complex algorithmic design, and drive engineering excellence in a high performance, data intensive environment.

Role – Core Engineering & Platform Delivery:

  • 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 largescale, 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
  • Supporting AI adoption journey. Developing and enhancing intelligent solutions using LLMs, LangChain/LangGraph, and agentic AI frameworks
  • Establishing 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
  • Core Java, Python
  • Building highly distributed, data intensive systems
  • Microservices, REST APIs
  • JVM profiling & performance optimisation
  • Prior exposure to Level 3 production support.

STRONG MARKET RATES – London x3 days as week – Multi year contract (inside IR35)

Diversity Statement

Synechron are proud to be an equal opportunity employer. Our Diversity, Equity, and Inclusion (DEI) initiative ‘Same Difference’ is committed to fostering an inclusive culture – promoting equality, diversity and an environment that is respectful to all. We encourage applicants from across diverse backgrounds, race, ethnicities, religion, age, marital status, gender, sexual orientations, or disabilities to apply. We offer flexible workplace arrangements, mentoring, internal mobility, learning and development programmes to support our global workforce. Empowerment and collaboration are at the core of how we operate.

All employment decisions at Synechron are based on business needs, job requirements and individual qualifications, without regard to the applicant’s gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law

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Posted: April 4th, 2026