Senior Software Engineer, Cloudflare



Salary dependent on location + Equity

Senior level
Remote in US
Los Angeles
San Francisco Bay Area

Web performance and security platform

Open for applications


Web performance and security platform

1001+ employees

B2BEnterpriseAnalyticsSaaSCyber Security

Open for applications


Salary dependent on location + Equity

Senior level
Remote in US
Los Angeles
San Francisco Bay Area

1001+ employees

B2BEnterpriseAnalyticsSaaSCyber Security

Company mission

Cloudflare's mission is to help build a better Internet that is bold and ambitious.


Who you are

  • We’re looking for curious, empathetic engineers who are excited to join us in changing the way networking is done!
  • Experience building and shipping large-scale, reliable, highly distributed systems
  • Systems-level programming experience, especially in Rust and/or Go
  • Expertise in L2, L3, and/or L4 networking protocols
  • Experience building on top of Linux kernel networking primitives – netfilter, nftables, eBPF, tc, network namespaces, etc
  • Experience designing and integrating RESTful APIs and backend systems
  • Experience with large-scale distributed data pipelines, from data structuring to efficient querying to data analysis
  • Excellent debugging and optimization skills
  • Attention to detail and ability to solve complex customer problems
  • Own solutions end-to-end and driving the design, development, and deployment process
  • Able to work across teams and level common, sustainable solutions
  • Creative, open-minded, collaborative problem solver
  • Focus on clarity in written and verbal communication

What the job involves

  • As a Software Engineer on our team, you will work across a wide range of technologies and systems to deliver new features, improve performance, and increase the scalability of our Network Services products
  • You’ll build, deploy, and operate your team’s systems on top of one of the largest edge networks in the world
  • You’ll partner with some of the best engineers and product managers to solve big problems that have a meaningful impact in the lives of our customers and users
  • Some of the things our teams work on include:
  • A Linux kernel-based networking dataplane which ingests and forwards traffic from some of the largest networks in the world
  • A userspace networking service which acts as a hub between our Network Services and Zero Trust systems, enabling every customer to access every product
  • Network software running on a hardware appliance that provides zero touch connectivity to the Cloudflare network and SD-WAN functions
  • Next-generation firewall functions implemented across Linux netfilter, eBPF, and userspace packet processing
  • Flow and log collection, correlation, and analytics systems to provide customers with unparalleled visibility into their own networks
  • Control plane systems which allow customers to simply express complex network configurations

Otta's take

Xav Kearney headshot

Xav Kearney

CTO of Otta

Cloudflare is a multi-service global network that provides web security and infrastructure, DDoS mitigation services, and a content delivery network. Founded in 2009, Cloudflare has risen to become an industry giant, with around 25 million global internet properties on its network.

Cloudflare has been responsible for a number of admirable initiatives, offering free web protection to human rights groups, journalists, artists, and US election websites. This goes some way to counteracting the flak Cloudflare has received in some circles for the controversial groups and users who use its services. This chequered history, however, has not affected its over 80% market share in the content delivery network field.

This is perhaps in part because it has proven sharp at staying abreast of the rapidly morphing tech and digital space and customer demands. For example, Cloudflare is shifting to 100% renewable energy usage to create a zero-emissions internet, and in 2020 released a feature that would help users navigate data privacy regulations by selecting where their data is stored.

The cloud infrastructure market reached $53 billion in 2022. While the Big 3 (Amazon, Microsoft, and Google) own 65% of the market, that still leaves billions of dollars left for companies such as Cloudflare. Its ambitious and successful work is likely to continue being a crucial feature of the web, but in 2023, placed it in the crosshairs of hackers looking to exploit its infrastructure. The beginning of 2024 saw Cloudflare vow to bolster its security and patch vulnerabilities.


Led by a woman

Some candidates hear
back within 2 weeks

16% employee growth in 12 months


Company benefits

  • Minimum 8 weeks of paid parental leave
  • Equal opportunity employer
  • Unlimited paid time off policy
  • Work from home opportunities
  • Medical, Dental & Vision Insurance
  • Life Insurance, Disability Insurance
  • 401(k) plans
  • Family planning and fertility program
  • Gym discounts
  • Commuter Benefits Program

Company values

  • Principled - We create our products and features with a global mindset and democratize important and innovative technologies that drive adoption of the latest standards
  • Curious - Our team is made up of pioneering innovators that approach new challenges with interest and a desire to learn
  • Transparent - We hold ourselves accountable when we make mistakes—and we do everything we can to learn from them

Company HQ

China Basin, San Francisco, CA


Lee Holloway

(Lead Engineer)

Lee started their career as an Engineer at Homewarehouse for a year before working at Unspam Technologies for 4 years. They co-created Project Honey Pot in 2004 and Cloudflare in March 2009, serving as Lead Engineer of both to present.

Michelle Zatlyn

(President & COO)

Having worked for Investor Economics and I Love Rewards for a combined 4 years, Michelle worked at Toshiba for 3 years as a Product Manager. She then co-founded Cloudflare in 2009 as COO, and has served as President since 2020. She is also a Board Member at Atlassian.

Matthew studied for an MBA at Harvard Business School before co-founding Unspam Technologies in December 2001, and Cloudflare as CEO in March 2009.

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