Job Description
We are looking for an experienced Linux Systems Engineer to join a high-performance technology team within a high-frequency trading firm.
The role will focus on building, maintaining and optimizing bare-metal Linux infrastructure, with an emphasis on ultra-low-latency performance, hardware optimization and system reliability.
The ideal candidate will have deep Linux engineering experience, strong knowledge of operating system internals and hands-on experience working with physical server hardware in performance-critical environments.
Key Responsibilities
- Design, build and maintain high-performance bare-metal Linux infrastructure.
- Provision, configure and manage physical servers, including OS installation, BIOS, firmware and hardware configuration.
- Optimize Linux systems for low latency, high throughput and minimal system jitter.
- Perform kernel tuning, CPU isolation, IRQ affinity, NUMA optimization and CPU scheduling configuration.
- Analyze and troubleshoot hardware, kernel and operating system performance issues.
- Work with network engineering teams to optimize low-latency Linux networking.
- Automate infrastructure deployment, configuration and management.
- Develop tooling and scripts to improve infrastructure performance and operational efficiency.
- Work closely with developers, quantitative researchers and trading teams to support critical trading infrastructure.
Essential Skills & Experience
- Strong commercial experience as a Linux Systems Engineer or Linux Infrastructure Engineer.
- Extensive hands-on experience building and managing Linux on bare-metal physical servers.
- Deep understanding of Linux internals, kernel architecture and operating system behavior.
- Experience with Linux performance tuning and low-latency optimization.
- Strong knowledge of CPU architecture, NUMA, memory management, interrupts and processor scheduling.
- Experience with server hardware, BIOS/UEFI and firmware configuration.
- Strong troubleshooting and performance analysis capabilities.
- Proficiency in Bash and/or Python scripting.
- Experience with infrastructure automation and configuration management.
Desirable Experience
- Experience optimizing Linux for microsecond or sub-microsecond latency.
- Knowledge of Solarflare, Xilinx or NVIDIA/Mellanox network cards.
- Experience with DPDK, OpenOnload, RDMA or kernel bypass technologies.
- Understanding of TCP/IP, UDP, multicast and high-performance networking.
- Familiarity with Intel Xeon and AMD EPYC architectures.
- Experience with PTP, hardware timestamping and colocated data center environments.