Senior Low Latency Kernel Engineer C++/Linux - Selby Jennings

Senior Low Latency Kernel Engineer (C++/Linux) Want to work where nanoseconds matter? We're partnering with a top-tier quantitative trading firm seeking a Low-Latency Kernel Engineer to push the limits of Linux, networking, and hardware performance. This is a deeply technical role focused on kernel tuning, CPU and memory optimization, network stack performance, and ultra-low-latency C++ development. You'll work directly with FPGA, infrastructure, and hardware teams to eliminate bottlenecks across the entire stack. What you'll be doing: • Optimising Linux kernels and network stacks for deterministic low-latency performance • Analysing CPU, cache, memory, NUMA, and scheduling behaviour • Developing high-performance C++20 systems used in trading and market data environments • Leveraging tools such as perf, eBPF, and ftrace to identify and remove bottlenecks • Collaborating with FPGA engineers on hardware-accelerated solutions What we're looking for: • 6+ years of modern C++ (C++20+) experience • Deep expertise in Linux internals, kernel tuning, networking, and systems programming • Strong understanding of CPU architecture, cache hierarchies, memory management, and performance profiling • Exceptional academics from a top university in Computer Science, Mathematics, Engineering, Physics, or a related quantitative field • A genuine passion for low-level performance engineering Nice to have: • DPDK, XDP, AF_XDP, RDMA, OpenOnload, or other kernel-bypass technologies • FPGA or hardware acceleration exposure • Experience in HFT, trading systems, market data, telecoms, or other latency-sensitive environments Join a team of elite engineers solving some of the hardest performance challenges in the industry, where every optimisation can directly impact production trading performance. Apply for more info.