About the job

In a front‑office trading environment, milliseconds matter — and the systems you build will directly influence PnL. We’re looking for a high‑performance Linux Systems Engineer to join our trading technology client, working at the heart of a real‑time execution platform. You’ll engineer, optimise, and support the Linux infrastructure that powers a global trading strategies, ensuring ultra‑low latency, high throughput, and absolute reliability.

• What You’ll DoEngineer, tune, and operate Linux-based trading infrastructure supporting live front‑office trading.
• Troubleshoot complex OS, hardware, and network issues across a latency‑sensitive production environment.
• Automate provisioning, configuration, and systems management using Python, Bash, and modern config‑management tools.
• Benchmark, profile, and optimise system performance — from kernel parameters to NIC tuning — to reduce latency and increase stability.
• Deploy, test, and maintain mission‑critical applications used directly by traders and quants.
• Manage core services (DNS, NTP/PTP, DHCP, LDAP, NFS) across on‑prem and cloud environments.

• What You BringDeep hands‑on experience with Linux systems engineering in high‑availability or trading environments.
• Strong troubleshooting skills across OS, hardware, networking, and performance bottlenecks.
• Proficiency in Python and shell scripting for automation and tooling.
• Experience with configuration management (Ansible, Puppet, SaltStack).
• Understanding of networking fundamentals: TCP/UDP, multicast, routing, DNS.
• Ability to operate calmly and decisively in production‑critical, time‑sensitive situations.
• Bonus: experience with low‑latency systems, kernel tuning, FPGA‑adjacent workflows, or exchange connectivity.

Why JoinYou’ll work directly with traders, quants, and core engineering teams, shaping the systems that drive real‑time decision‑making and execution. This is a role where your work has immediate impact — improving latency, stability, and throughput translates directly into trading performance.

Requirements added by the job poster • 3+ years of work experience with Linux • Authorized to work in United Kingdomp.

Linux Server Administration, CentOS, Ubuntu, AlmaLinux, Windows Server, VPS and Dedicated Server Provisioning, KVM, OpenVZ, Virtualizor, OpenStack, WHM/cPanel, Apache, Nginx, DNS Management, IP Routing, Load Balancing, iptables, CSF, UFW, firewalld, SSH Hardening, RAID, LVM, JetBackup, rsync, Backup and Disaster Recovery, Cron Jobs, Bash Scripting, Git, Log Analysis, Performance Monitoring, Incident Management, SLA Compliance, ITSM Best Practices, AI Tools and Automation