Site Reliability Engineer - Observability

Purpose of the role

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.

• Languages:
  
  Python, Go
• Observability: open-source stacks for logs, metrics, traces, alerting;
  Open Telemetry
• Orchestration:
  Kubernetes
• Git Ops:
  ArgoCD
• Infrastructure-as-code:
  Terraform, Ansible, Puppet
• Storage at scale:
  Click House
• Platform:
  Linux, on-premise data centers

• Design, deploy, and operate observability pipelines for logs, metrics, traces, and alerts across Proton’s services using open-source technologies.
• Partner with development and platform teams to ship practical alerting, dashboarding, and integration solutions that engineers actually rely on.
• Build reusable templates and tooling that streamline onboarding, incident response, and analysis.
• Champion observability best practices across teams and raise the bar for how Proton instruments its systems.
• Build AI-powered tooling that sharpens detection, analysis, and response capabilities.
• Evolve the observability platform iteratively to meet the real needs of internal stakeholders.

• Extensive experience in an SRE, Dev Ops, or Platform Engineering role.
• Comfortable writing Python and/or Go for tooling and automation.
• Hands‑on experience operating open-source observability stacks (logs, metrics, traces, alerting).
• Working knowledge of Kubernetes and Git Ops workflows.
• Practical experience with infrastructure-as-code (Terraform, Ansible, Puppet, or similar) and solid Linux system administration skills.

• Familiarity with Open Telemetry.
• Experience running Click House for log and metric storage at scale.
• Interest in or experience with AI/ML tooling.

• Work that Matters: millions of people trust Proton with their privacy. We answer only to our users – not advertisers, not investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable. (read more about our impact )

• Stock Options: at Proton, we all have the opportunity to be owners of the company. From day one, you have a real stake in what we’re building. When Proton wins, you win.

• Technology: you’ll get the right hardware and the right software you need to do your best work.

• Learning & Development: we invest in your growth because sharp people make us better. Proton is one of the fastest ways to accelerate your career because you’ll be thrown into real challenges, with real ownership, from day one.

• Employee Benefits: your wellbeing isn’t an afterthought. We offer strong health coverage, solid retirement options, generous leave, and wellness support so you can bring your best self to work every day.

• In-Person
  
  Collaboration:
  
  amazing things happen when passionate, smart, and purposeful people get together in the same room. With offices across Geneva, Zürich, Barcelona, London and more, you’ll spend most of your time collaborating face‑to‑face with people who genuinely care about what they’re building.

• Food: lunch and snacks are on us every day in our offices so you can focus on the work and not on what’s for lunch.

• Transport: getting to the office shouldn’t cost you. We cover public transport, bike allowances, or parking, whichever works for you.

• Flexible Working: you own your schedule. Set hours that work for you and your team – because outcomes matter more than when the clock says you started.

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity,…