Senior DevOps Engineer - Platform

Proton, a privacy‑focused technology firm founded by CERN researchers in 2014, delivers encrypted services such as email, VPN, cloud storage, password management and calendar tools to millions worldwide. The company operates profitably without venture‑capital influence and employs a globally distributed team of over five hundred engineers. The Senior DevOps Engineer – Platform will be responsible for overseeing and expanding the continuous‑integration and delivery system that processes tens of thousands of jobs each day. This includes forecasting capacity, designing runner architecture and keeping the platform stable as usage patterns evolve. The role also involves refining GitOps processes built on ArgoCD, enhancing how cluster configurations are handled across environments, and pushing forward supply‑chain security initiatives that incorporate static analysis and artifact verification. Additionally, the engineer will diagnose intricate infrastructure failures that span networking, applications and operating systems. Candidates must bring extensive hands‑on experience with Kubernetes, especially tuning and troubleshooting on‑prem Linux workloads under real‑world pressure. A solid background in CI/CD pipelines is required, with familiarity with GitLab CI considered a plus. Practical use of GitOps tools like ArgoCD, programming ability in Python, Go or Rust sufficient to create supporting utilities,