Linux Systems Engineer

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., * Strong commercial experience as a Linux Systems Engineer or Linux Infrastructure Engineer. \n

• Extensive hands-on experience building and managing Linux on bare-metal physical servers. \n

• Deep understanding of Linux internals, kernel architecture and operating system behavior. \n

• Experience with Linux performance tuning and low-latency optimization. \n

• Strong knowledge of CPU architecture, NUMA, memory management, interrupts and processor scheduling. \n

• Experience with server hardware, BIOS/UEFI and firmware configuration. \n

• Strong troubleshooting and performance analysis capabilities. \n

• Proficiency in Bash and/or Python scripting. \n

• Experience with infrastructure automation and configuration management. \n, * Experience optimizing Linux for microsecond or sub-microsecond latency. \n

• Knowledge of Solarflare, Xilinx or NVIDIA/Mellanox network cards. \n

• Experience with DPDK, OpenOnload, RDMA or kernel bypass technologies. \n

• Understanding of TCP/IP, UDP, multicast and high-performance networking. \n

• Familiarity with Intel Xeon and AMD EPYC architectures. \n

• Experience with PTP, hardware timestamping and colocated data center environments. \n

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• Design, build and maintain high-performance bare-metal Linux infrastructure. \n

• Provision, configure and manage physical servers, including OS installation, BIOS, firmware and hardware configuration. \n

• Optimize Linux systems for low latency, high throughput and minimal system jitter. \n

• Perform kernel tuning, CPU isolation, IRQ affinity, NUMA optimization and CPU scheduling configuration. \n

• Analyze and troubleshoot hardware, kernel and operating system performance issues. \n

• Work with network engineering teams to optimize low-latency Linux networking. \n

• Automate infrastructure deployment, configuration and management. \n

• Develop tooling and scripts to improve infrastructure performance and operational efficiency. \n

• Work closely with developers, quantitative researchers and trading teams to support critical trading infrastructure. \n

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