Site Reliability Engineer

About Proton

Join Proton and build a better internet where privacy is the default

Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundamental human right. Since then, we’ve built the world’s largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar—tools used by millions globally to protect their freedom, fight censorship, and keep their data safe. In some situations, Proton has literally helped save lives!

We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants. Our 500+ team members across 50+ countries come from leading organizations and elite academic backgrounds. We move fast, keep hierarchy light, and prioritize impact over optics. If you want to do meaningful work with exceptionally high-caliber people, this is it. Join us and do work you can truly be proud of. Check our open-source projects here!

The team

We believe in small empowered teams that focus on delivering large impact. This requires strong engineers with product engineering mindset who can collaborate well, take ownership, and do whatever is needed to achieve our ambitious goals. Join a global team to shape Proton Meet, which was launched in March 2026 to provide free encrypted video calls for all.

What you will do

You will be responsible for the operational excellence of Proton Meet, which must run reliably 24/7 and scale with increasing traffic and complexity. You will work on research, development, load testing, and rollout of new services and infrastructure. You will work with SWE's to make sure systems have proper logging, monitoring, alerting, and on-call's. You must be great at debugging and figuring out problems that inevitably come up in production.

Job requirements

• Deep experience with Linux systems and Internet technologies (DNS, TLS, HTTP, WebSockets)
• Deep experience with infrastructure automation (Puppet, Terraform, Kubernetes)
• Experience managing load balancing (HAProxy),  data storage (PostgreSQL) and messaging systems (NATS)
• Experience with AI agents for coding, incident response, and stress testing
• Able to operate in a fast environment with teammates in other continents and take on-call's
• Excellent English communications, both written and spoken
• Bonus for experience with WebRTC and real-time streaming

What We Offer