Site Reliability Engineer

Proton•Geneva, IL

10h•Hybrid

About The Position

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! You will be part of the Infrastructure Systems team which provides all base platforms in Proton (Kubernetes, VM orchestration, Bare metal provisioning) as well as all the critical services for them (DNS, DHCP, SoT, Monitoring...).

Requirements

Knowledge of Linux operating system internals, networking stack, and kernel tuning
Strong Experience with Kubernetes orchestration and automation using Terraform, Ansible, Puppet or similar tools
Python proficiency for developing automation tools and operational scripts
Ability to design Highly Available and complex distributed scalable systems architecture
Hands-on experience with monitoring solutions like Prometheus and Grafana dashboards
Understanding of security principles and best practices for infrastructure

Nice To Haves

Experience with bare metal provisioning
On-premise cloud solutions experience
Contribution to open-source projects

Responsibilities

Oversee and optimize our rapidly expanding global network of thousands of servers
Design and implement automation systems that ensure 99.95%+ uptime across our infrastructure
Serve as an active member of the on-call rotation, troubleshooting complex technical challenges across different network environments and censorship scenarios
Develop and enhance sophisticated monitoring and alerting systems that provide real-time visibility into our global infrastructure
Engineer solutions to improve connectivity, stability, performance, scalability, security, and resilience—particularly in adversarial network environments