Senior Frontend Engineer (Accounts) in London

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 control 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.

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. 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. 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.

The Account team owns the capabilities across the full user lifecycle – from acquisition and account creation, through protection, recovery, and user management, to retention and end‑of‑life. Account is one of the key functions that are positioned centrally and contribute to all of Proton’s products.

Our web client is based on React/TypeScript, our mobile code is based on Kotlin (on Android) and Swift (on iOS), with a growing shared codebase in Rust. All client code is open‑source and GPL 3. We are migrating our infrastructure to Kubernetes. Everything runs on premise in Proton’s data‑centers. We use Jira and Confluence to organize our work.

With the increasing number of Proton product releases, we aim to accelerate this process by unifying the Account experience across all devices, clients, and audiences. The accounts team is growing fast, creating future opportunities to lead and take ownership of significant areas of the system.

You will be the primary web engineer responsible for shaping and delivering the Account experience for our B2B customers, working within small empowered teams that focus on delivering large impact.

What We Are Looking For

• Strong experience building modern web applications with React.
• Proficiency in TypeScript or another strongly typed language.
• Experience leading the delivery of large, complex frontend projects.
• A strong product mindset with a focus on delivering high quality, user‑centred experiences.
• Experience collaborating effectively within a distributed, cross‑functional team.

Bonus Points For

• Familiarity with identity and access management concepts.
• Experience building and scaling B2B products.
• Awareness of common client‑side security risks (e.g., OWASP Top Ten) and practical mitigation strategies.
• Experience with Grafana or other observability and monitoring platforms.
• High‑level understanding of cryptography fundamentals, such as key exchange and symmetric vs. asymmetric encryption.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also work from home up to 30% of the time, while enjoying great company during our three core days in the office.
• Technology: We provide all devices and software you need to excel in your role.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We support employees with transport costs by subsidising public transport, bike allowances, or parking spaces based on office location.
• Stock Options: All employees receive stock options when they join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We offer various learning opportunities, including training programmes, conferences, and events.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programmes.
• Work that Matters: Proton is a community‑first organisation, with revenue solely from user subscriptions, and we put our users and community first in everything we do.

Our Commitment to Diversity and Inclusion

We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio‑economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning so every voice is heard and respected.

Candidate Privacy Notice

When you apply for a position, your information is stored in Greenhouse in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position and may be retained for consideration of future roles that align with your background and skills.

Additional Support

If you need extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Proton Does Not Accept Unsolicited Resumes

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

Contact Information

If you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team.