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CloudFlare // highly-available global networks
Engineering, Full Time    London, UK    Posted: Saturday, July 27, 2019
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About Us

At Cloudflare, we have our eyes set on an ambitious goal: to help build a better Internet. Today the company runs one of the worlds largest networks that powers more than 10 trillion requests per month. Cloudflare protects & accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare have all web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance & a decrease in spam & other attacks. Cloudflare was recognized by the World Economic Forum as a Technology Pioneer & named to Entrepreneur Magazines Top Company Cultures list.

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

About the Department

Cloudflare's research team blurs the line between research & engineering by both writing production-quality code & producing top-caliber research. The team identifies the biggest unsolved problems or opportunities in the industry & works on long-term solutions in collaboration with external partners. Members of the team participate in Internet standards organizations like the IETF, publish their research in top journals, & work closely with the engineering organization to bring experimental projects from prototype to production service. Research engineers leverage Cloudflares internal systems in Rust, Go, Kafka, Postgres, ClickHouse, Kubernetes, Prometheus, & tools such as Cloudflares Workers platform.

What you'll do

You will be responsible for leading research projects in the areas of authentication, secure network protocols, privacy-enhancing technologies, low-level systems research, & artificial intelligence. Research engineers are expected to dive into existing codebases to make meaningful changes to existing products & to leverage Cloudflares global infrastructure to support research goal while maintaining the same high bar of code quality as the rest of the engineering organization.

Examples of desirable skills, knowledge & experience

  • Strong publication record
  • Track record of finding creative but practical solutions to difficult problems
  • Fluent in analyses of data sets such as logs
  • Strong understanding of the scientific method & experiment design
  • Confidence to work in multiple programming languages - could include Go, Rust, & Typescript
  • Experience mentoring interns/student researchers
  • Strong systems-level programming skills
  • Great oral & written communications skills
  • Desire to learn & improve
  • Understanding of security issues & responsibilities
  • Willing & eager to share knowledge

Bonus Points:

  • Experience (and love) for debugging to ensure the system works in all cases
  • Experience with Docker & container orchestration systems like Kubernetes
  • Experience with configuration management like Salt or Ansible
  • Experience with a continuous integration workflow & using source control (we use git)
  • Experience with monitoring, alerting & debugging high volume production systems
  • Designing & building APIs
  • Strong understanding of the Linux Kernel, DNS, TLS, or advanced cryptography
  • Familiarity with formal methods

What Makes Cloudflare Special?

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

Project Galileo: We equip politically & artistically important organizations & journalists with powerful tools to defend themselves against attacks that would otherwise censor their work, technology already used by Cloudflares enterprise customers--at no cost.

Project Athenian: We created Athenian Project to ensure that state & local governments have the highest level of protection & reliability for free, so that their constituents have access to election information & voter registration.

Path Forward Partnership: Since 2016, we have partnered with Path Forward, a nonprofit organization, to create 16-week positions for mid-career professionals who want to get back to the workplace after taking time off to care for a child, parent, or loved one. We released to help fix the foundation of the Internet by building a faster, more secure & privacy-centric public DNS resolver. This is available publicly for everyone to use - it is the first consumer-focused service Cloudflare has ever released. Heres the deal - we dont store client IP addresses never, ever. We will continue to abide by our privacy policy & ensure that no user data is sold to advertisers or used to target consumers.

Sound like something youd like to be a part of? Wed love to hear from you!

Cloudflare is proud to be an equal opportunity employer. We are committed to providing equal employment opportunity for all people & place great value in both diversity & 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 or via mail at 101 Townsend St. San Francisco, CA 94108.

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