Join Proton and build a better internet where privacy is the default At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open‑source technology to millions worldwide, ensuring access to privacy, security, and freedom online.
Our journey began with Proton Mail, the largest secure e‑mail service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high‑risk situations.
Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries,



from the world's top companies and universities. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online.
You will have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions.
We have a integral mindset and big ambitions but remain a start‑up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. The team Proton VPN enables millions of people to connect securely and privately, even in places where the internet is restricted or unreliable. Delivering that experience means our service must perform flawlessly under highly variable, real‑world conditions.
Position Overview We are looking for a Senior Performance Engineer to lead our efforts in making Proton VPN the fastest, most resilient, and most reliable VPN s

📌 Senior Development Engineer Security (España)
🏢 Proton
📍 España