I am listing mostly Mail desktop related positions, but there are a lot more on the site. New rust based client architecture: https://proton.me/blog/next-generation-proton-mail-mobile-ap...
1. Senior Software Engineer | London (UK), Geneva (Switzerland), Barcelona (Spain) | Windows, Linux, Rust, Mail | https://job-boards.eu.greenhouse.io/proton/jobs/4766179101
2. Software Engineer | London (UK), Geneva (Switzerland), Barcelona (Spain) | macOS, Windows, Linux, Rust, Mail | https://job-boards.eu.greenhouse.io/proton/jobs/4585460101
3. Staff QA Automation Engineer | London (UK), Geneva (Switzerland) | Mobile, Desktop | https://job-boards.eu.greenhouse.io/proton/jobs/4653905101
4. Senior Product Designer | London (UK), Paris (France), Barcelona (Spain) | Mobile, Desktop, Mail | https://job-boards.eu.greenhouse.io/proton/jobs/4606437101
5. Senior Product Manager | London (UK), Paris (France), Barcelona (Spain), Geneva (Switzerland) | Mobile, Desktop, Mail | https://job-boards.eu.greenhouse.io/proton/jobs/4364312101