Site Reliability Engineer - Observability

<h3>Join Proton and build a better internet where privacy is the default</h3> <p>Proton was founded in 2014 by scientists from CERN on a simple truth: <strong>privacy is a fundamental human right</strong>. 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.</p> <p>We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants. Our 700+ 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. Check our open-source projects <a href="https://proton.me/community/open-source">here</a>.</p> <h3><strong><strong class="Lexical__textBold">Purpose of the role:</strong></strong>  </h3> <p>We're a small, tool-agnostic team that owns the observability infrastructure behind Proton's services — the logs, metrics, traces, and alerts that keep systems running smoothly for the millions of users who trust us with their privacy. We run on open-source stacks across Proton's on-premise data centers, and we dogfood heavily: we're our own first customers. We favor simple, solid solutions over large engineering efforts, and we believe good systems emerge iteratively. You'll join a group that values frank, open communication and a problem-solving mentality — if you want narrow scope and a fixed backlog, this isn't the right fit.</p> <h3> </h3> <h3>Tech Stack and Tools</h3> <ul> <li>Languages: Python, Go</li> <li>Observability: open-source stacks for logs, metrics, traces, alerting; OpenTelemetry</li> <li>Orchestration: Kubernetes</li> <li>GitOps: ArgoCD</li> <li>Infrastructure-as-code: Terraform, Ansible, Puppet</li> <li>Storage at scale: ClickHouse</li> <li>Platform: Linux, on-premise data centers</li> </ul> <h3>What You'll Do</h3> <ul> <li>Design, deploy, and operate observability pipelines for logs, metrics, traces, and alerts across Proton's services using open-source technologies.</li> <li>Partner with development and platform teams to ship practical alerting, dashboarding, and integration solutions that engineers actually rely on.</li> <li>Build reusable templates and tooling that streamline onboarding, incident response, and analysis.</li> <li>Champion observability best practices across teams and raise the ba