London; Geneva On-site Full-time

Proton is hiring a Senior Software Engineer (Inbox Desktop)

Responsibilities

  • Evaluate emerging technologies and contribute to technical strategy across teams and business units.
  • Convert product requirements into actionable technical plans and oversee their execution.
  • Develop, deploy, and maintain new and existing features to deliver reliable user experiences.
  • Improve development workflows, tools, and processes to enhance scalability and developer efficiency.
  • Write clean, testable, and maintainable code to uphold high codebase standards.
  • Lead planning, scoping, and delivery of technical projects and new feature initiatives.
  • Support team growth through mentorship, promoting best practices in quality assurance and performance optimization.

Benefits

  • Collaborate in person during core office days, with up to 30% flexibility for remote work, at locations including Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei.
  • Engage in adopting and integrating new technologies in both new and established systems, with full access to necessary hardware and software tools.
  • Receive daily lunch and snacks at company offices.
  • Benefit from transportation support such as subsidized public transit, bike allowances, or parking, depending on location.
  • Receive stock options, reflecting shared ownership in the company.
  • Set your own work hours as long as availability aligns with team commitments.
  • Access professional development opportunities including training, conferences, and ongoing learning programs.
  • Enjoy comprehensive health coverage, retirement plans, generous leave policies, and wellness initiatives.
  • Contribute to a mission-driven organization focused on user privacy and community input, funded solely by subscriptions and trusted by over 100 million people.

Work Arrangement

On-site — Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, Taipei

Team

All teams operate within Europe, in time zones no more than one hour apart.

Our Commitment to Diversity and Inclusion

We believe diverse perspectives fuel innovation and strengthen our purpose of making privacy the default. We are dedicated to building an inclusive environment where individuals of all backgrounds—including race, ethnicity, gender, age, sexual orientation, physical ability, and socio-economic status—are respected and empowered. We promote equal opportunities, open communication, and continuous learning. If you require accommodations during the hiring process, please inform your recruiter.

Candidate Privacy Notice

Applicant data is stored in Greenhouse when applying, referring, or being considered for a role at Proton Technologies AG. Data is deleted or anonymized when no longer needed. For questions about data usage or to request access, correction, or deletion, contact careers@proton.ch. We do not accept unsolicited resumes and will not pay fees for unrequested candidate submissions, even if hired.

Other

  • All teams are located in Europe, within the same or adjacent time zones.
  • Flexible working hours are allowed as long as team coordination is maintained.
  • Daily lunch and snacks are provided at office locations.
  • All necessary devices and software are supplied to support high-performance work.
  • Transportation is supported via public transit subsidies, bike allowances, or parking, depending on office location.
  • Professional growth is supported through training, events, conferences, and continuous learning initiatives.
  • Benefits include comprehensive health insurance, retirement savings, generous leave, and wellness programs.
About company
Proton

Proton is a privacy-focused technology company that provides end-to-end encrypted services to protect users' digital lives. Founded to empower individuals with privacy and freedom online, Proton offers a suite of secure products including email, calendar, VPN, cloud storage, password management, and video conferencing.

Used by over 100 million people and organizations, Proton’s services are built on a foundation of zero-access encryption, open-source code, and independent security audits. The company is committed to transparency, community-driven development, and defending digital rights globally.

Headquartered in Switzerland, Proton operates under one of the world’s strongest privacy laws and is structured as a non-profit foundation to ensure its mission remains user-first.

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Job Details
Department Inbox Desktop
Category other
Posted 5 days ago