About Us

At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company.

At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in.

Linux Engineer

An engineering role at Cloudflare provides an opportunity to address some big challenges, at scale. We believe that with our talented team, we can tackle some of the biggest security, reliability and performance problems facing the Internet.

We are searching for Linux engineers to make our flavour of Linux fast, resilient and reliable across the many use cases that a distribution saving the Internet requires.

Our Engineers come from a variety of technical backgrounds and work across a broad range of environments and codebases. Common qualities across all of our performance-focused engineers include a passion for analysis, optimization, scaling, networking, cross-team collaboration and hard problem solving.

What you would be doing

Keep Cloudflare Linux platforms secure and up-to-date

Help with quick and safe deployment and delivery of the Linux kernel and basic operating system to Cloudflare Datacenters in more than 335 cities in over 100 countries

Continuously monitor and resolve kernel bugs and performance regressions

Design tools and frameworks for other engineering teams to successfully embrace and enable the latest Linux kernel features and optimizations

Help porting the Cloudflare software stack to new hardware platforms and architectures

Research and adopt the latest Linux kernel security features and performance improvements

Build tools and CI/CD pipelines for safe and automated operating system continuous deployment

Requisite skills

Experience with the Linux kernel and Linux software packaging

CS fundamentals and comfortable working in multiple programming languages and codebases; Comfortable working in Go, Rust, C, Bash, and Python.

Familiarity with constructing and using eBPF programs.

Understanding of Linux and POSIX operation systems concepts: processing, files, syscalls, and networking

Containerization technologies in Linux (e.g Docker, Namespaces, Cgroups)

Configuration management (e.g Saltstack, Chef) and CI/CD pipelines

Version control systems (git)

Examples of desirable skills, knowledge and experience

Performance analysis and debugging

Time series databases such as OpenTSDB, Graphite, Prometheus or Grafana

Key/Value stores

Network fundamentals DHCP, ARP, subnetting, routing, firewalls, IPv6, BGP

Experience in a DevOps team structure

Bonus Points

Experience with programming in C, Rust, Go, or similar languages

Experience with rapid release engineering

Upstream community contribution

Strong tooling and automation development experience