Senior Java Developers- Low Latency / Aeron
Location: London (2 days per week in the office)
Salary: Up to £195,000
Overview
We’re looking for an exceptional Senior Java Developer with strong Aeron and low-latency engineering experience to join a high-performance technology team building cutting-edge, latency-sensitive systems.
This is an opportunity for an experienced Java engineer to work on highly concurrent, performance-critical applications where speed, reliability and efficient system design are paramount.
The ideal candidate will have deep expertise in Java, hands-on experience with Aeron, and a strong understanding of JVM performance optimisation and low-latency system architecture.
Key Responsibilities
- Design, develop and optimise ultra-low-latency Java applications.
- Build high-performance messaging and communication systems using Aeron.
- Profile, benchmark and tune applications to minimise latency, garbage collection and CPU overhead.
- Develop highly concurrent, multithreaded systems with predictable performance.
- Optimise JVM behaviour, memory management, object allocation and garbage collection.
- Work closely with architects and other engineers to deliver scalable, resilient and high-throughput solutions.
- Investigate complex performance bottlenecks and drive continuous improvements.
- Contribute to technical design decisions, code quality and engineering best practices.
- Proven, hands-on experience with Aeron, ideally including Aeron Cluster and/or Aeron Archive.
- Strong experience designing and developing low-latency, high-throughput systems.
- Excellent understanding of JVM internals, garbage collection, memory allocation and performance tuning.
- Strong knowledge of multithreading, concurrency, lock-free programming and CPU-level performance optimisation.
- Experience with profiling, benchmarking and performance analysis.
- Solid understanding of network protocols, messaging architectures and distributed systems.
- A strong engineering mindset, with a focus on measurable performance improvements and clean, maintainable code.
- Experience in electronic trading, capital markets or other latency-sensitive environments.
- Familiarity with Linux performance tuning and operating system internals.
- Knowledge of CPU cache behaviour, memory barriers, mechanical sympathy and hardware-aware optimisation.
- Experience with Chronicle, Disruptor or similar high-performance technologies.
- Familiarity with network-level optimisation and efficient binary protocols.
What’s on Offer?
- Salary up to £195,000, depending on experience.
- Hybrid working, with 2 days per week in London.
- The opportunity to work on technically challenging, performance-critical systems.
- A high-calibre engineering environment where technical expertise and innovation are valued.
Interested?
If you’re a Senior Java Developer with deep Aeron knowledge and a passion for pushing the boundaries of low-latency performance, we’d love to hear from you.
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