Senior Frontend Engineer (Pass)

Paris; Barcelona Join Proton and build a better internet where privacy is the default At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online. Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations. Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online. Hiring at Proton is highly selective, with less than 1% of candidates hired. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. You will have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions. We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our open-source projects here! The Pass Team 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. What you will do: 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 testsand end-to-end testing tests,to ensure the reliability ofthe Proton Pass product.

Job Requirements:

• Proven front-end expertise with deep technical knowledge of browser internals,extension APIs,and desktop application frameworks.
• Deep understanding ofthe 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 offeringthe 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 extensionsand/or cross-platform web applications.
• Experience working with service-worker architectures.
• Experience with WebAssemblyand/or Rust.
• Experience with breaking down product requirements into architecture designand implementation.
• Experience with event-driven systems.
• Familiarity with UX,accessibilityand localization concerns.
• Experience with application monitoring strategies.
• High-level understanding of cryptography concepts such as key exchangeand the difference between symmetricand asymmetric encryption.

What We Offer:

• Office First: Collaboration is easierand more effective in person,which is why we have offices in Geneva,Zurich,Prague,arcelona,Paris,London,Vilnius,Skopje,

nd Taipei. You can also enjoy working from home up to 30% of the time while enjoying great company during our three core days in the office.

• Technology: We provide all the devices

nd software you need to excel in your role ensuring you haveest tools at your disposal to achieve your goals.

• Food: Lunch

nd snacks are provided by Proton every day at our offices.

• Transport:We will always support our employees with transport costs through subsidizing public transport bike allowances or parking spaces based on your office location.
• Stock Options: At Proton we are all owners of the company

nd you get stock options when you join us.

• Flexible Working:You can define your own working hours as long as it works with team meetings.
• **Learning

and Development:** We are committed to your professional growth. Proton offers various learning opportunities including training programs conferences events continual learning.

• Employee Benefits: Comprehensive health insurance plans competitive retirement savings options generous vacation leave policies wellness programs.
• Work that Matters: Proton is a community-first organization started with support crowdfunding campaign built community input To this day Proton’s only source revenue user subscriptions Over 100 million people trust support Proton put users community first everything do Read more about impacthere.

Our Commitment to Diversity and Inclusion At Proton we believe diversity drives innovation strengthens mission provide privacy as default for all We are committed fostering inclusive environment where all individuals regardless race ethnicity gender age sexual orientation physical ability socio-economic background feel valued empowered We strive create equal opportunities promote open dialogue support continuous learning ensure every voice heard respected If you need any extra support or reasonable adjustments during hiring process please let talent partner know. Candidate Privacy Notice When apply position refer candidate considered role Proton Technologies AG (Proton we us our) information stored Greenhouse accordance Service Privacy Policy information used evaluate suitability posted position also retain information consideration future roles may apply believe may align background skills If no longer legitimate business need process information will either delete anonymize Should inquiries how use manage information wish access correct delete data please contact privacy team careers@proton.ch Proton does not accept unsolicited resumes from any sources other than directly from candidates We will not pay fee placement resulting unsolicited offer even if candidate subsequently hired by Proton To learn more about privacy policy please visit our privacy policy page

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