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# Experienced C++ Engineer - Linux Kernel & Ultra-Low Latency Trading

- **Company:** Selby Jennings
- **Location:** London, UK
- **Experience:** Experienced
- **Salary:** £88,363.0
- **Contract:** Permanent contract
- **Skills:** C++ (Programming Language), Protocol Stack, Microarchitecture, Software Debugging, Linux, Field-Programmable Gate Array (FPGA), Linux Kernel, Non-Uniform Memory Access, Perf (Linux), Information Technology, Low Latency, C++14
- **Published:** October 3, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5908896286

## About the Role

* Linux kernel, scheduler, and network stack optimisation
 * CPU, cache, NUMA, and memory performance analysis
 * Low-level profiling using perf, eBPF, ftrace, and hardware counters
 * Kernel tuning, CPU isolation, IRQ affinity, and latency reduction
 * Cross-stack optimisation alongside FPGA, hardware, and infrastructure specialists

What They're Looking For

 * 3-12 years of modern C++ (C++17/20)
 * Strong Linux systems programming expertise
 * Deep understanding of Linux internals and performance engineering
 * Experience debugging bottlenecks across kernel, CPU, memory, and hardware layers
 * Knowledge of CPU architecture, networking, and low-latency systems
 * Elite academic credentials: First-Class degree (or equivalent GPA) from a top university in Computer Science, Mathematics, Physics, Engineering, or a related STEM field