Senior Systems Engineer - London & Lisbon

Cloudflare is seeking a Senior Systems Engineer to join their team in either London or Lisbon. As a key member of Cloudflare's engineering organization, you'll work on systems that power millions of websites worldwide. The role involves building and maintaining large-scale distributed systems that are deployed across 330+ cities globally.

The position offers an opportunity to work on critical infrastructure that makes the Internet better, safer, and more powerful. You'll be involved in various projects, from TLS/HTTP proxies and content optimization to serverless platforms and massive data pipelines processing over 250M events per second.

The ideal candidate should have strong systems-level programming skills, experience with distributed systems, and proficiency in languages like Go and Rust. Knowledge of databases (particularly PostgreSQL), Unix systems, and security principles is highly valued. The role requires a curious mindset, critical thinking abilities, and a passion for debugging complex systems.

Working at Cloudflare means joining a company with a strong social mission, including initiatives like Project Galileo, which protects journalism and civil society organizations, and the Athenian Project, which secures election websites. The company offers a hybrid work environment requiring at least two days per week in the office.

This is an excellent opportunity for experienced engineers who want to make a significant impact on Internet infrastructure while working with cutting-edge technology at massive scale. The role combines technical challenges with the satisfaction of building systems that make the Internet better for millions of users.