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. In some situations, Proton has literally helped save lives
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. Join us and do work you can truly be proud of. Check our open-source projects here
Purpose of the role:

The VPN team is focused on building the best and most trustworthy VPN in the world.



We aim to provide the best user experience to millions of people around the world willing to take back their online privacy, while providing sophisticated technologies to bypass network restrictions in highly censored countries.

What you will do:
Work closely with a group of Back-End Engineers and Architects to build resilient, massively-scalable solutions for millions of people to rely on
Collaborate with teams of client application developers and product management to ensure that the back-end meets critical business and reliability requirements
Document back-end capabilities and their proper use so that all Proton VPN clients can implement correctly-functioning solutions
Debug and repair vital systems such as the systems responsible for cleaning up file revisions and returning quota to users
Job requirements:
Experience with PHP-based entry-points to a back-end software stack
Experience building scalable solutions
Experience with pr

📌 Backend Engineer (Barcelona)
🏢 Proton
📍 Barcelona