Senior Java Developer (Low-Latency) - Leading Investment Bank - J12483

We are looking for a Java Developer to work on low-latency, high-throughput trading systems within a global investment bank. This role sits close to the front office, building and optimizing platforms where microseconds matter and failures are not tolerated. Responsibilities Design and develop low-latency Java applications supporting electronic trading and market connectivity Optimize system performance across GC, threading, memory allocation, and network I/O Build and maintain real-time services processing high message and transaction volumes Work closely with traders, quants, and electronic trading teams to deliver performance-critical features Analyze and resolve latency bottlenecks across application, JVM, and OS layers Ensure systems are resilient, fault-tolerant, and production-ready Participate in production support for latency-sensitive systems

Requirements Strong commercial experience in Java (Java 8+) for low-latency or high-performance systems Deep understanding of JVM internals, garbage collection, and memory management Strong experience with concurrency, lock-free or low-lock designs Experience with high-performance messaging (FIX, Kafka, Aeron, custom protocols) Solid Linux knowledge, including performance tuning and troubleshooting Strong SQL and experience with relational databases Experience working in investment banking, trading, or electronic markets

Nice to Have Experience with FIX protocol or electronic trading platforms Exposure to real-time pricing, order management, or execution systems Knowledge of networking concepts (TCP/UDP, multicast) Experience with profiling tools (JFR, async-profiler, Flight Recorder) C++ exposure in low-latency environments