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. We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants. If you want to do meaningful work with exceptionally high-caliber people, this is it. Check our open-source projects here
At ProtonVPN, we're on a mission to provide secure, private internet access to everyone—even in the most restrictive environments. Our infrastructure spans thousands of servers worldwide, operating on a distributed architecture that connects our suite of applications across platforms.
As a Systems and Reliability Engineer on the VPN Infrastructure team, among several areas,



you'll be at the forefront of our battle against censorship regimes worldwide. Infrastructure Management : Oversee and optimize our rapidly expanding integral network of thousands of servers
Serve as an active member of the on-call rotation, troubleshooting complex technical challenges across different network environments and censorship scenarios
Monitoring Excellence : Develop and enhance sophisticated monitoring and alerting systems that provide real-time visibility into our global infrastructure
Technical Implementation : Engineer solutions to improve connectivity, stability, performance, scalability, security, and resilience—particularly in adversarial network environments
Linux Expertise : Knowledge of Debian/Linux operating system internals, including NFtables, networking stack, and kernel tuning
Infrastructure as Code : Experience with orchestration and automation using Ansible or similar tools
Programming Skills : Python proficiency for deve

📌 Senior System Engineer (Barcelona)
🏢 Proton
📍 Barcelona