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CloudFlare // highly-available global networks
Engineering, Full Time    San Francisco, CA    Posted: Wednesday, June 12, 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!

Aboutthe Department

Cloudflares Engineering Team builds & runs the software that handles about 10% of HTTP requests on the Internet today. We also build & run the internal tools that build & run our software. The Engineering Team is split into two groups: one handles product development & the other handles operations. Product development covers both new features & functionality & scaling our existing software to meet the challenges of a massively growing customer base. The operations team handles one of the worlds largest networks with data centers in 102 cities worldwide.

What you'll do

We are looking for experienced backend engineers to join one of our teams in San Francisco. The ideal candidates will have experience working withlarge-scale distributed systemsand a track record of producing great output.

You must care deeply not only about the quality of your & the team's code, but also the scalability of the system you are building.Depending on the team you will be joining, you will be responsible for designing, building, & scaling backend services that power a variety of Cloudflare systems, from our customer & internal tools APIs to our Billing system & our TLS & Load Balancing offerings.

We work iteratively & deploy often (sometimes several times per day).Technologies we use include Go, Python, PHP, PostgreSQL, MySQL, Redis, Kafka, Docker & more.

Our San Francisco teams include:


The team that is responsible for our API gateway, identity access & management, development & maintenance for a large portion of our customer APIs, & responsibility for our primary database that manages the core entities in our domain model.

Security Engineering

The team has ownership of our TLS offerings (Universal SSL, Dedicated Certificates, etc), the series of pipelines that drive certificate ordering, issuance, & deployments to our edge, along with the customer UIs to manage it all.


Building & maintaining the systems & interfaces that define our product offering, the control mechanisms for giving customers access to those products, & the overall purchase experience.

Load Balancing

The team owns our load balancing product end-to-endfrom the core functionality at our edge, to internal systems & pipelines, to the configuration & reporting UI available in our customer dashboard.


The team is responsible for all the DNS systems in Cloudflare including the Managed Authoritative DNS service & Public Resolver.


A cross-functional team dedicated to building systems to support, enhance, & optimize the customer onboarding experience.

Desirable skills & experience

Note: it is not required that you have all of these! Teams have varying needs, focuses, & use varying technologies.

  • BA/BS in Computer Science or equivalent
  • Minimum of 2+ years experience building backend services
  • Knowledge of one or more mainstream programming languages (Go, C/C++, Java, Python, PHP)
  • Working knowledge of SQL & relational databases such as PostgreSQL or MySQL
  • Experience building & operating distributed systems
  • Excellent debugging & optimization skills
  • Unit/integration testing experience
  • Ability to own & drive projects

Bonus points

  • Experience with message queues (Kafka, RabbitMQ, etc)
  • Experience with key-value data stores (Redis, HBase, HDFS, or other)
  • Familiarity with TCP/IP or DNS
  • Experience with API tooling & standards (Swagger/OpenAPI, OAuth/JWT)

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 94107.

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