Systems Engineer, DNS

As a Systems Engineer on the DNS team at Cloudflare, you will be a key contributor to one of the core systems that help build a better Internet. You will take ownership of medium-to-large projects, driving them from initial design to successful completion with some supervision. In this role, you will act as a natural point of contact for your projects, mentor junior engineers, and help improve the resilience and architecture of our systems. We are looking for an engineer who can solve complex issues with minimal help and contribute to shaping features and processes within a talented, collaborative team.

Responsibilities

Maintain and expand our DNS infrastructure, implementing features for our customers; Write high-quality, maintainable, and well-tested code that simplifies and improves our systems; Act as a subject matter expert for moderately complex systems, becoming a go-to person for questions about the projects you work on; Proactively identify issues affecting the team and propose effective solutions to improve our processes and technology; Collaborate with Product and other stakeholders to provide meaningful input on product requirement documents (PRDs); Serve as a mentor and onboarding guide for junior team members, helping them grow through thoughtful code and design reviews; Debug and resolve complex service issues with minimal assistance, improving system resilience through refactoring and re-architecting

Requirements

BA/BS in Computer Science or a related field, or equivalent practical experience; Strong systems programming fundamentals, including performance, concurrency, and networking; Ability to write production code in Rust or Go, or a track record of learning a comparable language quickly; A habit of measuring before optimizing and reasoning about failure modes; Willingness to own changes beyond the code: rollout, monitoring, on-call, and follow-up; Ability to drive projects to completion and scope work effectively for yourself and other team members

Nice to have

DNS experience is welcome, not required; Experience running established team meetings or technical discussions; Contributions to technical documentation or talks that guide your team or organization; Experience interviewing and providing meaningful feedback on technical candidates; Familiarity with building services in a large-scale, high-performance environment; Open source contributions; Knowledge of DNSSEC and various security extensions to DNS; Knowledge of HTTP, TLS and CDN Networks