At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, 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.

Drive Foundation

Drive Foundation is the backbone of Proton Drive. We ensure that cross-client initiatives are executed consistently and efficiently. Whether it’s aligning multiple clients, maintaining documentation or the RFC process, or building robust SDKs, our team lays the groundwork that makes the entire Drive experience work seamlessly.

We’re currently focused on developing SDKs that encapsulate the core functionality of Proton Drive. The SDK comes with two implementations, one in C# for desktop and mobile clients and second in TypeScript for web client. Our SDKs primarily serve internal clients today, but our long-term vision includes integrating them across the Proton ecosystem—and even enabling third‑party applications to interface with Drive.

As a Drive Foundation Engineer, you will play a crucial role in designing, implementing, and maintaining the foundational components that power Proton Drive applications. You will work collaboratively with Drive teams, including backend, web, mobile, or desktop developers, to ensure seamless integration and optimal performance across various client applications.

What you will do

- Architect and develop core libraries: Lead the design and development of core C#/TypeScript/Rust libraries that serve as the backbone for Proton Drive’s applications.
- Cross‑platform compatibility: Ensure compatibility and optimal performance across various platforms.
- Code review and optimization:



Conduct code reviews and provide constructive feedback to ensure code quality, maintainability, and performance optimization.
- Collaboration: Work closely with backend, frontend, mobile and desktop developers to integrate core libraries seamlessly into Proton Drive’s applications.
- Testing: Develop and implement comprehensive testing strategies, including unit tests and integration tests, to ensure the reliability of core libraries.
- Documentation: Create and maintain thorough documentation for core libraries to assist other developers in understanding and utilizing the components.

Job requirements

- Experience: 5+ years of professional software development experience, with a focus on the Rust programming language.
- Rust proficiency: Strong expertise in Rust language features, concurrency, and ownership models.
- Web, mobile, and/or desktop development: Experience in developing libraries for client applications.
- Collaborative skills: Proven ability to work collaboratively in a team environment and excellent communication skills.
- Problem‑solving: Strong problem‑solving skills and the ability to troubleshoot issues efficiently.

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 enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. Depending on the role, fully remote positions may also be available.
- Technology: We provide all the devices and software you need to excel in your role,



ensuring you have the best tools at your disposal to achieve your goals.
- Food: Lunch and 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 and you get stock options when you join us.
- Adaptable 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 and events, and continual learning.
- Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
- Work that Matters: Proton is a community‑first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. 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 to ensure every voice is heard and respected.

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

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📌 Drive Architect (Barcelona)
🏢 Proton
📍 Barcelona