Principal Systems Engineer, DevTools

Cloudflare
· United States, Atlanta, GA / Austin, TX / Denver, CO / Washington, DC

At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code.

Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company.

At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a “normalized” problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up.

If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in.

The Developer Tooling team builds internal tools and platforms that improve the velocity and developer experience of Cloudflare’s engineering teams. We own developer productivity (code commit to production), developer insights and ADLC metrics, developer infrastructure (CI/CD, build systems), AI-assisted development, and Cloudflare-on-Cloudflare dogfooding.

This team is responsible for AI-assisted development across all of Cloudflare engineering. Adoption has grown 4-6x in the last year. It’s a small team, so you’ll have a big surface area and real ownership from day one.

As a Principal Engineer, you’ll build and operate the AI tools thousands of engineers use every day. It’s a hands‑on role with both engineering and operational responsibility. You’ll be embedded with the Dev Tools Engineering Manager and help shoulder technical mentorship and end‑to‑end ownership of projects, while caring deeply about the experience of the engineers you build for.

• Ship features for our AI coding tools
• Build and improve AI and other developer‑observability tools.
• Build AI agents.
• Maintain our context engineering: shared configs, prompt libraries, and agent instructions.
• Handle security and access controls for AI tools.
• Track adoption and usage across the org.
• Triage and respond to support in our tool channels.
• Own projects end to end – from roadmap and prioritization through delivery and operation.
• Mentor teammates and raise the bar through code review and design feedback.
• Help respond to and prevent incidents on the tools engineers depend on.

• Strong coding ability in Type Script, Go, Rust and Bash.
• Source control experience including branching, merging, and rebasing.
• Experience deploying and operating on Kubernetes or a similar platform.
• Comfort breaking down complex problems, weighing trade‑offs, and driving them to done.
• A habit of mentoring and raising the bar for the people around you.
• Experience with, or strong interest in, building tools that improve Dev Ex
• Experience building LLM‑based tools in production (agents, evals,…