Senior Systems Reliability Engineer (SRE), Edge

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.

Available Locations: London, UK

About the Role

We are looking for talented Systems Reliability Engineers to build and operate our Edge platform running in more than 320 cities in over 120 countries. Our SREs come from diverse technical backgrounds and have built up their knowledge working in different environments, but common factors across all of our reliability-focused engineers include a passion for automation, scalability, and operational excellence. We support our services in a “follow the sun” model with offices in East Asia, Europe and North America.

This is a superb opportunity to join a high-performing team and scale our high-growth network as Cloudflare’s business grows. We live at the boundary between systems, network, and software, and love improving the glue that holds them together. Working with us, you will build tools to constantly improve service availability, performance, and operational velocity. You will nurture a passion for an “automate everything” approach that makes systems failure resistant and ready to scale.

SREs focus on the immediate state and functionality of the Cloudflare platform around the world, leveraging an array of monitoring, alerting and diagnostics tools while developing and enhancing the Cloudflare platform and its capabilities. We own a wide portfolio of applications and services, running a tight feedback loop of developer and operator patterns. The ideal SRE candidate has a passionate curiosity about how the Internet fundamentally works and has a strong knowledge of networking, Linux and TLS along with coding ability in Go or Python.

This role may require flexibility to be on-call outside of standard working hours to address technical issues as needed.

Requisite Skills

Aptitude for identifying problems, owning them and working with others to solve them

Linux systems experience

3 years experience in an SRE role or a role with similar functions

Software development skills in some programming language such as Go or Python

Understanding of distributed software systems and large scale system design tradeoffs

Intermediate experience of common network protocols like DNS and HTTP

Understanding of routing protocols and concepts such as BGP and IP anycast

Examples of desirable skills, knowledge and experience

Experience with the Linux kernel and Linux software packaging

Performance analysis and debugging

Configuration management systems such as Saltstack, Chef