Senior Java Low-Latency Developers

Location: London
Contract: 12 months
Working Pattern: Hybrid - 3 days per week onsite
Positions: 3

We are recruiting experienced Senior Java Low-Latency Developers to design and develop high-performance trading, exchange connectivity and Direct Market Access platforms.

This is a hands-on senior engineering role focused on building resilient, scalable and latency-sensitive systems using Core Java / JDK 17+, microservices, distributed systems and event-driven architecture.

Essential experience:

• Strong hands-on Core Java development, preferably JDK 17+.
• Proven experience building low-latency, high-throughput trading, order management or market connectivity platforms.
• Deep knowledge of multithreading, concurrency, memory management, garbage collection, JVM tuning and mechanical sympathy.
• Strong experience with performance profiling, throughput optimisation and scalable distributed architectures.
• Hands-on experience with microservices, asynchronous processing, messaging and event-driven integration.
• Experience with automated testing, performance testing, Agile and CI/CD.
• Approximately 10+ years' technology experience, including significant experience within Financial Services.

Desirable experience:

• FIX Protocol and binary exchange protocols
• Direct Market Access (DMA), electronic trading and exchange connectivity
• High-performance messaging, caching and non-blocking processing
• Latency measurement and performance optimisation
• Cloud-native technologies and container platforms
• Observability and modern DevOps tooling
• GitHub Copilot or similar AI-assisted engineering tools
• Technical architecture, engineering standards and governance

Candidates must be able to work 3 days per week onsite in London.

Keywords: Core Java, JDK 17, Low Latency, High Throughput, Electronic Trading, FIX Protocol, DMA, Exchange Connectivity, Market Connectivity, Multithreading, Concurrency, JVM Tuning, Mechanical Sympathy, Microservices, Event-Driven Architecture, Distributed Systems, CI/CD

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