Low Latency Java Engineer - Remote

Java Developer – Low Latency Systems

Location: Remote | Permanent | Competitive + Bonus

About the Role

We're working with a fast-growing technology firm building ultra-low-latency, high-throughput systems used across global financial markets , trading platforms, market data infrastructure, and messaging technology operating in the microsecond and nanosecond range. Their technology is trusted by tier-1 banks, hedge funds, and exchanges worldwide.

Our client is looking for a Java Engineer to join their core engineering team, working on performance-critical infrastructure where every allocation, every branch, and every cache line matters.

What You'll Do

• Design and build high-performance, low-latency Java components used in demanding production trading environments
• Profile and optimise for latency and throughput at a granular level, GC behaviour, memory layout, off-heap storage, lock-free concurrency
• Work directly with client engineering teams to integrate the technology into partner systems
• Contribute to libraries and frameworks used across the industry
• Participate in design discussions, code reviews, and mentoring of junior engineers

What They're Looking For

• Strong commercial Java experience, ideally with exposure to low-latency, high-throughput, or real-time systems
• Deep understanding of the JVM, garbage collection, memory management, JIT behaviour
• Experience with concurrent and lock-free programming
• Familiarity with off-heap data structures, memory-mapped files, or custom serialisation
• Experience in fintech, trading systems, or performance engineering is highly desirable
• A genuine interest in performance, someone who enjoys shaving microseconds off a hot path

Nice to Have

• Experience with high-performance messaging/queuing libraries (e.g. Aeron, Chronicle, Disruptor, or similar)
• Experience with FIX protocol or market data feeds

Why Apply

• Work on technology at the cutting edge of performance engineering
• Small, senior, highly technical team, no bureaucracy, direct impact
• Exposure to some of the most demanding software problems in the industry
• Competitive salary, bonus, and benefits package