Systems Engineer, DNS
Core
Build and operate Cloudflare's custom-built, large-scale DNS infrastructure handling 3 trillion queries/day, focusing on protocol implementation, distributed systems, and reliability.
Role type
Senior Systems Engineer (DNS)
Builds
Authoritative DNS services, public recursive resolver (1.1.1.1), and global query distribution systems
Domain
Internet Infrastructure / Distributed Systems / DNS
Required skills
Systems programming, Rust or Go, Networking, Concurrency, Performance optimization, Debugging complex services, Project ownership, Mentoring
Preferred skills
DNSSEC, HTTP, TLS, CDN Networks, Open source contributions
Technologies
Rust, Go, DNS, HTTP, TLS, CDN
Responsibilities
Maintain and expand DNS infrastructure, write high-quality production code, act as subject matter expert, proactively identify and resolve system issues, collaborate on PRDs, mentor junior engineers, debug and refactor complex services
