Senior Low Latency Java Engineer - High Performance Systems - McGregor Boyall

We are hiring an experienced Senior Software Engineer with deep expertise in ultra-low-latency, high-throughput Java systems. This is a role for someone who builds systems that push performance boundaries, not just enterprise-grade services.

You'll join a specialist engineering group designing fault-tolerant, sub-40µs latency pipelines, shaping architecture decisions and solving complex technical challenges that require first principles thinking.

What You'll Be Working On

• Designing and optimising high-performance Java services with lock-free, zero-allocation and low-GC approaches.
• Hardware-aware optimisation including CPU architecture, cache behaviour, kernel tuning, core pinning and memory layouts.
• Building and improving ultra-low-latency messaging pipelines (Multicast, TCP, IPC).
• Working directly with senior engineering leadership on system architecture and performance strategy.
• Driving technical direction and mentoring senior members of the team.

• 10+ years professional engineering experience with core Java in latency-sensitive environments.
• Strong knowledge of:

• Ring buffers
• Off-heap / zero-allocation techniques
• IPC and high-performance networking
• Linux kernel optimisation

• Domain experience in eTrading, market-making, sports betting, high-frequency messaging or telecoms is highly desirable.
• You thrive in environments where independent problem solving is key.