Java Low Latency Connectivity Developer London 4 Days Office, Victoria Crytpo Exchange Connectivity / FIX A specialist electronic trading firm is seeking a Java Low Latency Connectivity Developer to join a highly technical, performance-driven engineering team. The business operates automated trading strategies across both traditional financial markets and crypto venues. Technology is central to performance, and connectivity to exchanges is a core competitive edge. This is a hands-on role within a small, experienced team where engineers work directly on systems that impact live trading outcomes. The Role You will be responsible for designing, building and optimising exchange connectivity across multiple venues, with a strong focus on crypto markets. Key responsibilities include: Developing ultra-low latency Java components Managing FIX protocol sessions and order flow Integrating and optimising crypto exchange APIs using REST and WebSocket Handling real-time JSON market data feeds Improving performance and reducing latency across exchange connections Supporting and enhancing live trading systems Each exchange has its own architecture, API behaviour and performance characteristics. You will play a key role in ensuring reliable, high-performance connectivity across them. What We Are Looking For Strong core Java expertise Experience in low latency or performance-critical systems Solid understanding of FIX protocol (session and application layers) Direct experience connecting t