Skills

Python Go Rust Ansible Test Research Linux Ubuntu C++ Terraform

Job Specifications

Linux Engineer – Up to £300k-£550k Total Comp | London

We’re hiring for a Linux Engineer to join the Compute Engineering team at one of the most technically advanced hedge funds and market makers in the world (client name kept confidential). This is a rare opportunity to work on low-level Linux engineering that directly supports global trading and research systems.

This isn’t a typical Linux admin role. You won’t be managing users or installations — you’ll be writing the code that shapes the Linux OS itself, making kernel-level changes, tuning for ultra-low latency, and solving the kinds of problems that get escalated all the way to Red Hat.

What you’ll be doing:

Writing and maintaining tools and infrastructure around the Linux OS
Working closely with hardware and trading teams to fine-tune system performance
Digging deep into memory, CPU, and I/O behavior to uncover and fix bottlenecks
Automating the build, test, and release of custom Linux images
Helping shape the future of Linux systems at scale in a highly technical, low-latency environment

What we’re looking for:

4+ years of deep Linux experience — ideally across RHEL, CentOS, or Ubuntu
Strong coding skills in Python or Go (bonus points for C++ or Rust)
Experience tuning system performance (kernel parameters, memory, scheduling, etc.)
Knowledge of infrastructure-as-code tools (e.g. Ansible, Terraform, Packer) is a plus
Someone who’s curious, hands-on, and thrives in an engineering-driven culture

Why this role stands out:

You’ll work on genuinely challenging, interesting problems with real-world impact
The team is highly respected — they submit the most bugs to Red Hat
You’ll be surrounded by some of the best engineers in the industry

About the Company

Denu Recruit (pronounced Denee) is a UK recruitment company focused on hiring software engineering into start-up and scale up tech firms. Denu is a Welsh verb meaning to attract, to entice, to draw and as a proud Welsh man I wanted to use the Welsh language when I founded this company. My name is Aaron Shakeshaft, the founder of Denu Recruit, bringing 8 years of experience in recruitment agency mainly in the software engineering world. I've worked with large and small tech companies across many industries including but no... Know more