Senior Java Low-Latency Developer - 12 months - LONDON (2-3 days)- Inside IR35

Senior Java Low-Latency Developer - 12 months - LONDON (2-3 days)- Inside IR35

We are seeking Senior Java Low-Latency Developers to join a leading global investment bank on a 12-month hybrid contract based in London (3 days on-site). You will design, develop, and deliver high-performance trading, exchange connectivity, and Direct Market Access (DMA) platforms, building resilient, scalable, latency-sensitive solutions in modern Java. Working closely with Product Management and global Engineering, QA, and Production Support teams, you will translate business requirements into robust technical solutions that support the evolution of next-generation market connectivity.

Key Responsibilities:

• Design, develop, and support high-performance, low-latency trade execution, exchange connectivity, and DMA platforms
• Build resilient solutions using Core Java (JDK 17+), microservices, distributed systems, and event-driven architecture
• Apply low-latency design patterns, mechanical sympathy, concurrency techniques, and systematic performance optimisation
• Diagnose performance bottlenecks and production issues using profiling, monitoring, observability, and root-cause analysis
• Develop automated testing frameworks, engineering tools, and delivery environments, and define test strategies for trading workflows and exchange integration
• Partner with Product Management and global engineering teams to improve platform capability, scalability, resiliency, and latency
• Champion Agile engineering, CI/CD, secure development, and appropriate use of AI-assisted engineering tools
• Provide technical leadership, contribute to architectural governance, and mentor engineers

What You Will Ideally Bring:

• Strong hands-on Core Java experience, preferably JDK 17 or later
• Proven experience building and supporting low-latency, high-throughput trading, order management, or market connectivity platforms
• Deep understanding of Multithreading, concurrency, memory management, garbage collection, JVM tuning, and mechanical sympathy
• Strong knowledge of low-latency system design, performance profiling, throughput optimisation, and scalable distributed architecture
• Hands-on experience with microservices, asynchronous processing, messaging, and event-driven integration
• Experience with FIX Protocol and binary exchange protocols for market connectivity, order routing, and trade execution

Contract Details

• Duration: 12 months initial
• Rate: £450-500 per day
• Determination: Inside IR35
• Location: London (Hybrid)

Senior Java Low-Latency Developer - 12 months - LONDON (2-3 days)- Inside IR35