Senior Low Latency Kernel Engineer C++/Linux - Selby Jennings
eFinancialCareersSenior 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.
Opens the company's application page
Listed via
Reed
reed.co.uk
Similar roles
Design & Tech
Related reads from TCHNX
The Quiet Revolution in Local-First Software
As major platforms face outages and data breaches, a new generation of developers is building applications that prioritise local data storage and peer-to-peer sync, challenging the cloud-first orthodoxy that's dominated tech for two decades.
The Quiet Revolution in Edge AI: Why Your Next Computer Might Not Need the Cloud
As neural processing units become standard in consumer devices, we're witnessing a fundamental shift in how AI applications work. Local processing is no longer a fallback; it's becoming the preferred architecture.
The Rise of AI-Assisted Code Generation 2: Are Developers Becoming Prompt Engineers?
As AI coding assistants reshape software development, the industry grapples with a fundamental question: is writing code giving way to writing prompts? We examine how London's tech scene is adapting to this seismic shift.