> Markdown version of [/jobs/ext/2726304-frontend-engineer](https://www.wearedevelopers.com/jobs/ext/2726304-frontend-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Frontend Engineer - **Company:** Proton Pass - **Location:** France - **Experience:** Expert - **Salary:** €54,000.0 - €106,000.0 - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Software Applications, Unit Testing, Software Quality, Code Review, Continuous Integration, Software Design Patterns, HP Systems Insight Manager, Virtual Private Networks (VPN), Open Source Technology, Password Management, Performance Tuning, Software Construction, TypeScript, Web Applications, Web Platforms, Backend, Event Driven Architecture, Front End Software Development - **Published:** September 5, 2026 - **Apply:** https://startup.jobs/senior-frontend-engineer-pass-proton-7998386 ## About the Role * Proven front-end expertise with deep technical knowledge of browser internals, extension APIs, and desktop application frameworks. * Deep understanding of the Javascript ecosystem. * Proficiency with TypeScript or type-safe programming paradigms. * Strong understanding of software engineering best practices, Design patterns, CI/CD. * A product mindset with a focus on offering the best user experiences. * Experience working in a distributed team. Bonus points for: * Experience with modern MV3 browser extension development. * Experience with Electron or similar desktop application frameworks. * Experience with browser extensions and/or cross-platform web applications. * Experience working with service-worker architectures. * Experience with WebAssembly and/or Rust. * Experience with breaking down product requirements into architecture design and implementation. * Experience with event-driven systems. * Familiarity with UX, accessibility and localization concerns. * Experience with application monitoring strategies. * High-level understanding of cryptography concepts such as key exchange and the difference between symmetric and asymmetric encryption. ## Description Proton Pass is a secure, open-source password manager developed by Proton-the team behind Proton Mail and Proton VPN. Built with end-to-end encryption and a strong commitment to privacy, Proton Pass helps individuals and teams safely manage passwords, 2FA codes, notes, and more. As part of the Proton ecosystem, it integrates seamlessly with other privacy-first tools, ensuring robust protection for your digital identity., We're seeking an experienced developer working across multiple web platforms including browser extensions, web and desktop applications. This role requires both front-end expertise and deep technical knowledge of browser internals, extension APIs, and desktop application frameworks * Develop new features: Developing, deploying and supporting high-quality user experiences, including feature development and implementation. * Collaboration: Work closely with backend, product owners, designers, QA, and other engineers to take initiatives from ideation to completion. Break down large initiatives into smaller milestones to gather stakeholder feedback quickly. * Code review and optimization: Conduct code reviews and provide constructive feedback to ensure code quality, maintainability, and performance optimization. * Testing: Develop and implement comprehensive testing strategies, including unit tests and end-to-end testing tests, to ensure the reliability of the Proton Pass product. ## Related Videos - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Do TypeScript without TypeScript](https://www.wearedevelopers.com/videos/327-do-typescript-without-typescript) - [Are Code Reviews Worth It? Insights from 16 Years of Review Data](https://www.wearedevelopers.com/videos/1135-are-code-reviews-worth-it-insights-from-16-years-of-review-data) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) ## Related Articles - [8 Best Edge Extensions And Addons For Developers](https://www.wearedevelopers.com/magazine/205-8-best-edge-extensions-and-addons-for-developers) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 106 - DHH in HD](https://www.wearedevelopers.com/magazine/394-dev-digest-106-dhh-in-hd)