Senior Software Engineer, Windows (Drive)

Proton

CH - Geneva💼 Full-time💰 $49,000–$80,000🗓 2026-07-20 → 2026-09-26

Core

Design, build, and maintain Proton Drive and other privacy-focused applications on the Windows desktop platform.

Role type

Senior IC Windows Desktop Engineer

Builds

Proton Drive and related client applications for Windows users

Domain

Privacy technology / Desktop software

Deliverable

product features

Required skills

.NET development, Windows Desktop application development, concurrent multi-threaded programming, file system knowledge, Git, large component ownership, metrics/monitoring/alerting frameworks

Preferred skills

Gradual rollout experience, automation testing

Technologies

.NET, Windows, Git

Responsibilities

Develop Windows applications with end-to-end encryption, manage local and remote state synchronization, perform cryptographic operations, configure Gitlab and handle deployments, respond to operational incidents, invest in testing and automation, ensure high standards for application monitoring.

Seniority

Senior, hands-on IC

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About Proton

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!