High-Performance Java Developer - JVM Tuning & Low-Latency Systems | London (Hybrid Contract)

Are you an experienced Java Developer with deep expertise in JVM tuning, low-latency systems and high-performance engineering?

Skillfinder International is recruiting for an exciting contract opportunity within a major financial services environment, working on complex, performance-critical systems supporting projects across EMEA and the US.

This is an opportunity to tackle challenging engineering problems, optimise system performance and work with cutting-edge Java technologies in a demanding, high-throughput environment.

What you'll be doing

• Designing and developing high-performance, low-latency Java applications.
• Optimising JVM performance, garbage collection and memory management.
• Building event-driven and reactive systems handling high-frequency workloads.
• Working with concurrency, networking protocols and Linux internals.
• Collaborating with international engineering teams on business-critical initiatives.

Essential skills

• Java performance engineering and advanced JVM tuning.
• Strong knowledge of data structures, algorithms and concurrency.
• Experience building low-latency, high-throughput systems.
• Expertise in GC, JNI, Java Unsafe or JNR-FFI.
• Understanding of CPU architecture, shared memory, memory-mapped files and TCP/UDP networking.

Nice to have

• Aeron messaging technology.
• Previous experience in financial services or trading environments.

Why consider this opportunity?

• Hybrid working in London.
• Technically challenging, performance-critical engineering.
• Exposure to international projects across EMEA and the US.
• Opportunity to work with specialist engineers on complex distributed systems.