Software Engineer, Network Firewall

At Cloudflare, we're on a mission to help build a better Internet.

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.

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.

Desirable Skills, Knowledge, and Experience

• 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

Bonus Points

• 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