Cloud-Native Performance Engineer

Proton Barcelona, Spain Posted 6 Sept 2026

About this role

Senior Performance Engineer We are looking for a Senior Performance Engineer to lead our efforts in making Proton VPN the fastest, most resilient, and most reliable VPN service in the world. What you will do Design and own Proton VPN's performance framework, defining metrics and KPIs that reflect the real-world experience of users (time-to-connect, throughput, latency, stability, reconnection rates, etc.). Develop distributed testing systems that simulate real network conditions, including low …

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