Cloudflare logo

Software Engineer (Security Platform, Internal PKI)

Worldwide flag Worldwide


Posted 12 days ago

Job Type

Full Time


$168k - $229k



Country of Employment



  • Mission to help build a better Internet by providing secure infrastructure

  • Lead the design of a robust PKI system for internal services at Cloudflare

  • Opportunity to work on cutting-edge security technologies and contribute to a diverse and inclusive team


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!

Why you should join us

As a Security Platform Engineer at Cloudflare you will help us provide a secure infrastructure for one of the biggest online platforms in the world, handling extensive amounts of traffic at very low latency. You will be instrumental at defining the vision to help secure Cloudflare going forward.

Cloudflare firmly believes that security is an integral part of our product offerings, and the qualified candidate will directly contribute to delivering on that promise.

About the team

The Security Platform team is responsible for secrets and internal certificate management at Cloudflare, and has the mandate of building powerful and robust infrastructure and tools that enable other engineering teams to deliver secure products to our customers without sacrificing development velocity.

What you’ll do

  • Build and manage the PKI that provides trusted certificates to all of our internal services with fine-grained authentication and authorization controls

  • Create and support robust client-side automation tooling to enable the use of short-lived certificates while maintaining reliability

  • Promote the use of strongly-authenticated mTLS for all service-to-service communications and work with other engineering teams to develop solutions for their use cases

  • Communicate and execute on periodic CA rotations and migration to best practices

  • Contribute to the strengthening of CA and leaf certificate key protection schemes to elevate our security profile

What you’ll need

  • Familiarity with PKI standards and their surrounding ecosystem (X.509, TLS, etc.)

  • Experience running an internal or public PKI with deep understanding of their requirements and pitfalls

  • Worked with codebases and developed in Go or Rust

Bonus points

  • Familiarity with SPIFFE/SPIRE or other service identity framework/standards

  • Experience executing CA rotations for a reasonably large environment

  • Worked with HSMs, TPMs, or other platform TEEs (AMD SEV, Intel SGX, Apple Secure Enclave)


Compensation may be adjusted depending on work location, or levelling.

  • For Colorado-based hires: Estimated annual salary of $168,000 - $206,000.

  • For New York City, Washington, and California (excluding Bay Area) based hires: Estimated annual salary of $187,000 - $229,000.

  • For Bay Area-based hires: Estimated annual salary of $196,000 - $240,000


This role is eligible to participate in Cloudflare’s equity plan.


Cloudflare offers a complete package of benefits and programs to support you and your family.  Our benefits programs can help you pay health care expenses, support caregiving, build capital for the future and make life a little easier and fun!  The below is a description of our benefits for employees in the United States, and benefits may vary for employees based outside the U.S.

Health & Welfare Benefits

  • Medical/Rx Insurance

  • Dental Insurance

  • Vision Insurance

  • Flexible Spending Accounts

  • Commuter Spending Accounts

  • Fertility & Family Forming Benefits

  • On-demand mental health support and Employee Assistance Program

  • Global Travel Medical Insurance

Financial Benefits

  • Short and Long Term Disability Insurance

  • Life & Accident Insurance

  • 401(k) Retirement Savings Plan

  • Employee Stock Participation Plan

Time Off

  • Flexible paid time off covering vacation and sick leave

  • Leave programs, including parental, pregnancy health, medical, and bereavement leave

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.

: We equip politically and artistically important organizations and journalists 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.

: We created 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 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 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 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 or via mail at 101 Townsend St. San Francisco, CA 94107.