Senior Foundation Engineer; Drive

Drive Foundation Overview

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.

• Developing SDK that encapsulate the core functionality of Proton Drive.
  • The SDK comes with two core implementations, one in C# for desktop and mobile clients and one in Type Script for the web client, and higher‑level modules in Rust. Our SDK primarily serves 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.

• Languages:
  • C#, Type Script, Rust, plus bindings for Swift and Kotlin.
• Tools:
  • Grafana, Prometheus for instrumentation;
    Sentry for issue telemetry;
    Git Lab CI for running tests including e2e tests written with Playwright; general Git Lab use for code base workflow.

• Revamp the cryptographic model to boost performance and efficiency across all clients.
• Complete the first generation of SDK to cover all core Drive features and new crypto model.
• Develop a second generation in Rust with lessons learned, including full support for Photos, Public Sharing, and Docs.

• Foundation work touches every aspect of Drive; the SDK and infrastructure you build will be used by every Drive client.
• Drive is rapidly expanding; as it evolves into a true platform, more teams will emerge, offering opportunities to grow as an IC, tech lead, or engineering manager.
• You’ll have the chance to shape the future of Drive and your own career path in a variety of domains and technologies.

As a Senior 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.

• Architect and develop core libraries: Lead the design and development of core C#, Type Script, and 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.

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

Even if you don’t meet all the requirements listed above, but feel you could still be a great fit, please still apply.

• Work that Matters: millions of people trust Proton with their privacy. We answer only to our users – no advertisers, investors, or governments with conflicting agendas. The work you do here is real, and the impact is measurable.
• Work with smart and dedicated people: Our team is diverse, collaborative, and tight‑knit with people coming from all walks of life, including many of the world’s top academic institutions and organizations.
• Technology: you’ll…