Senior System Engineer

We’re supporting a global systematic trading firm that is expanding its core infrastructure group. This team builds, maintains, and improves the Linux platforms that underpin the firm’s research, trading, and large-scale compute environments.

You’ll be working across a fast-moving, collaborative engineering function where automation, reliability, and performance are non-negotiable.

What you’ll be working on

Managing and supporting a large fleet of Linux servers in a production environment

Performing system changes, patching, troubleshooting, and incident response

Improving automation using Ansible and scripting (Bash/Python)

Integrating Linux systems with authentication and privilege-management platforms

Maintaining storage, mounts, and file-system configurations (CIFS/NFS/Samba/LVM)

Partnering with internal teams to analyse logs, tune performance, and prevent issues

Updating documentation and contributing to operational standards

What you’ll bring

5+ years Linux administration experience (RHEL preferred)

Strong hands-on experience with automation and IaC (Terraform, Ansible, Puppet, etc.)

Knowledge of authentication/AD integration and privilege management

Bash or Python scripting for automation

Understanding of networking fundamentals (TCP/IP, DNS, DHCP, Kerberos)

Experience with storage and mount configurations

Strong communication skills and the ability to work in high-ownership environments

If you enjoy solving complex systems problems and working close to trading technology, this is a great next step.