Java Full Stack Developer

London
2 days ago
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Java Full Stack Developer

Location: London - Hybrid – 3 days per week onsite

Start Date: ASAP

Contract Rate: TBC, likely in the region of £500 per day inside IR35

Duration: 6 months initially

Role Overview

Our client is seeking a Senior Java Full Stack Developer to help design, build, and support complex Java/Python applications within a distributed, microservices‑driven environment. You’ll work across global teams, contribute to an AI‑focused engineering roadmap, and provide critical L3 production support to ensure stability and performance.

Key Responsibilities

  • Develop and maintain Java & Python applications, microservices, and distributed systems.

  • Work with global product, UX, and engineering teams to deliver high‑quality solutions.

  • Contribute across the full SDLC, ensuring scalable, secure, test‑driven delivery.

  • Support L3 production incident resolution, root‑cause analysis, and preventive fixes.

  • Perform code reviews, enforce best practices, and mentor junior engineers.

  • Lead development tasks and uphold high engineering standards.

    Skills & Experience

    Essential:

  • 10+ years' backend engineering experience.

  • Strong Java, Python, microservices, REST APIs, distributed systems.

  • RDBMS (Oracle/SQL Server/Postgres), CI/CD, Docker, Kubernetes.

  • JVM tuning, performance optimisation, algorithms & data structures.

  • L3 production support experience.

  • Experience with LLMs, LangChain/LangGraph, and production‑ready AI engineering.

    Desirable:

  • Mentoring/technical leadership.

  • Financial services experience.

  • Spring Boot, Kafka, Redis, in‑memory caching.

  • BDD tools (Cucumber/JBehave/Karate).

  • Agile/Scrum understanding.

    If you have the relevant skills and experience, please do apply promptly to be considered

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