Windows Software Engineer

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.

• Design, build, maintain, and evolve Proton’s applications on Windows.
• Participate in the entire application life‑cycle from feature design and implementation to CI/CD, deployment, monitoring, and incident response.
• Collaborate closely with product managers and engineers across the company to deliver privacy‑preserving products used by millions worldwide.
• Help define, maintain, and improve our testing stack, including unit tests, integration tests, and automated GUI tests.
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