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.

We realize people do not fit into neat boxes. We are looking for curious and empathetic individuals who are committed to developing themselves and learning new skills, and we are ready to help you do that. We cannot complete our mission without building a diverse and inclusive team. We hire the best people based on an evaluation of their potential and support them throughout their time at Cloudflare. Come join us!

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, Puppet or Ansible
Load balancing and reverse proxies such as Nginx, Varnish, HAProxy, Squid or Apache
SQL databases
Time series databases such as OpenTSDB, Graphite, Prometheus or Grafana
Key/Value stores

Bonus Points

Experience with continuous / rapid release engineering
Strong tooling and automation development experience
Experience working in a 24/7/365 service environment
Experience working with large scale production distributed systems
A history of contributing to Open Source Software

Some tools that we use

Nginx
PostgreSQL
Docker
Prometheus
Grafana
Consul
Nomad
Salt

What Makes Cloudflare Special?

We’re not just a highly ambitious, large-scale technology company. We’re a highly ambitious, large-scale technology company with a soul. Fundamental to our mission to help build a better Internet is protecting the free and open Internet.

Project Galileo: Since 2014, we've equipped more than 2,400 journalism and civil society organizations in 111 countries with powerful tools to defend themselves against attacks that would otherwise censor their work, technology already used by Cloudflare’s enterprise customers--at no cost.

Athenian Project: In 2017, we created the Athenian Project to ensure that state and local governments have the highest level of protection and reliability for free, so that their constituents have access to election information and voter registration. Since the project, we've provided services to more than 425 local government election websites in 33 states.

1.1.1.1: We released 1.1.1.1 to help fix the foundation of the Internet by building a faster, more secure and privacy-centric public DNS resolver. This is available publicly for everyone to use - it is the first consumer-focused service Cloudflare has ever released. Here’s the deal - we don’t store client IP addresses never, ever. We will continue to abide by our privacy commitment and ensure that no user data is sold to advertisers or used to target consumers.

Sound like something you’d like to be a part of? We’d love to hear from you!

This position may require access to information protected under U.S. export control laws, including the U.S. Export Administration Regulations. Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.S. export laws without sponsorship for an export license.

Cloudflare is proud to be an equal opportunity employer. We are committed to providing equal employment opportunity for all people and place great value in both diversity and inclusiveness. All qualified applicants will be considered for employment without regard to their, or any other person's, perceived or actual race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship, age, physical or mental disability, medical condition, family care status, or any other basis protected by law. We are an AA/Veterans/Disabled Employer.

Cloudflare provides reasonable accommodations to qualified individuals with disabilities. Please tell us if you require a reasonable accommodation to apply for a job. Examples of reasonable accommodations include, but are not limited to, changing the application process, providing documents in an alternate format, using a sign language interpreter, or using specialized equipment. If you require a reasonable accommodation to apply for a job, please contact us via e-mail at hr@cloudflare.com or via mail at 101 Townsend St. San Francisco, CA 94107.

Systems Reliability Engineer (SRE), Edge