Proton:Senior Foundation Engineer (Drive):Geneva or London, ONSITE

hn · Proton:Senior Foundation Engineer (Drive):Geneva or London, ONSITE

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Jose has 12+ years of professional experience building production systems at scale, strong full-stack capabilities, and demonstrable expertise in C# and TypeScript. However, while Rust appears in his technical skills, there's no evidence of significant ownership-level Rust experience or library-building for client SDKs; his Rust background appears less developed than the job requires, and his recent work focuses heavily on AI/LLM products rather than foundational infrastructure.

Hook: Your experience shipping complex systems across web, mobile, and desktop platforms with deep TypeScript and C# expertise makes you a strong fit for Proton Drive's SDK foundation work.

Missing: Demonstrated ownership-level Rust experience, Library design for multi-platform client SDKs, Cryptography implementation experience, Privacy-focused infrastructure background

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Proton:Senior Foundation Engineer (Drive):Geneva or London, ONSITE

Proton builds the privacy-first alternative to Big Tech: Mail, VPN, Drive, Pass, Calendar, and Lumo AI. We're profitable, have no VC control, and are majority owned by the nonprofit Proton Foundation, so no one can force a change in mission.

The Drive Foundation team builds the core SDK powering every Proton Drive client,C#, TypeScript, and Rust daily, with Swift and Kotlin bindings for mobile. It's foundational work: what you build here ships to every Drive client, and there's a crypto model revamp plus a Rust based next gen SDK on the roadmap.

Looking for someone with 5+ years of professional software experience and strong Rust expertise (ownership, concurrency), plus experience building libraries for client applications (web/mobile/desktop). Don't check every box but think you'd be a strong fit? We say apply anyway.

Apply here: https://job-boards.eu.greenhouse.io/proton/jobs/4630103101