Software Engineer, Network Firewall

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 will help evolve our Network Firewall and related security capabilities across both north-south and east-west network architectures with demanding throughput and latency requirements. Youll build deploy and operate your teams systems on top of one of the largest edge networks in the world. Youll 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.

• Experience building and shipping large-scale reliable highly distributed systems
• Systems-level programming experience; experience with Go and/or Rust is valuable
• Expertise in L3 and L4 networking protocols; L2 experience is also valuable
• Experience building high-performance network security products such as network firewalls IDS/IPS DDoS mitigation rate limiting packet capture or threat intelligence integrations
• Experience with low-latency userspace packet processing; familiarity with Linux kernel networking primitives such as netfilter nftables eBPF tc and network namespaces is also valuable
• 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 profiling and performance optimization skills for high-throughput latency-sensitive systems

• 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 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 and open Internet.

Project Galileo: Since 2014 weve equipped more than 2400 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 Cloudflares 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 weve 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. Heres the deal - we dont 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 youd like to be a part of Wed love to hear from you!

Please note that applicants who progress to the offer stage of the interview process may be asked to attend an in-person interview within one of the Cloudflare Offices or Cloudflare Hubs. More details about this will be available at that stage of the interview process.

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 persons 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.