Senior Low Latency Java Engineer - High Performance Systems

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.

• 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.

This is not a feature-factory role. You will own problems, drive optimisation decisions, and shape how real-time financial markets infrastructure is engineered.

Location: UK based Compensation: Competitive base salary + performance bonus + pension + benefits Working Model: Hybrid flexible

McGregor Boyall is an equal opportunity employer and do not discriminate on any grounds.