Senior Systems Engineer - Application Security

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 Intern...

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 ...

Available locations: Amsterdam, Netherlands, Brussels, Belgium, Lisbon, Portugal, London, UK, Munich, Germany, Paris, France, Sweden, Switzerland. This role requires two days in office, it is not a fully remote role.

Design systems and write code following bleeding edge industry best practices and help others on the team do the same. Review RFCs, technical specifications and code.
Deploy and maintain live software-based services at scale (up to 100m requests / second, 1m customers). Take regular shifts as part of the team’s On Call rota.
Support and grow other Engineers through knowledge sharing.
Keep up to date with trends in detecting current and emerging security risks to web applications and provide input on how these impact Cloudflare’s products.
Work with Engineers and Product Managers outside your immediate team in communicating our roadmap and getting things done.

You must have at least 5 years of professional experience working hands-on as a software developer. We require proficiency with at least one of Go or Rust, plus exposure to devops tooling like but not limited to Kubernetes, Salt, Kafka or Systemd. Strong Linux / Unix fundamentals will be very helpful. You must have experience working with distributed systems at scale. Experience with cyber security is preferred but not essential.
Cloudflare’s culture is busy and multifaceted, and people who succeed here are persistent, have a can-do attitude and a genuine willingness to assume good faith in others. This last quality in particular requires them to be empathetic and emotionally intelligent, so you’re someone willing to take responsibility for the culture and environment that you create around you.