Senior Rust Software Engineer

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 Techs 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 some cases Protons 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 worlds 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 worlds 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 ouropen-sourceprojectshere!

The team:

• The goal of the Payments team is to enable revenue generation for the entire Proton ecosystem. This comes in the form of introducing new payment methods for users to architecting our client libraries. This team has impact across all of Protons products and is critical to the success of the business as a whole.
• Drive Foundation is the backbone of Proton Drive. We develop the Proton Drive SDKs the core of all of Proton Drives client applications as well as the cornerstone of Drive into other Proton applications businesses and 3rd parties. We ensure that cross-client and backend initiatives are executed with consistency and correctness; we also build and maintain the core documentation for Drive and define the architectural roadmap to evolve Drives technology both server-side and client-side.

• We use standard tools for communication and work organization (Git GitLab GitHub GitLab CI Jira Confluence). Languages we see daily is C# and TypeScript. We also need to provide bindings for Swift and Kotlin and we plan to add Rust to avoid the need to have two SDK implementations. We use Grafana and Prometheus to instrument our SDK Sentry to get details issues from the SDK usage GitLab CI for running tests including e2e tests written using Playwright for both SDKs or GitLab in general to work on the code base.

Purpose of the role:

As a Senior Rust Developer on our team you will play a crucial role in designing implementing and maintaining components that power Proton Drive and Payments. You will work collaboratively in a cross-functional team including backend API web frontend Mac Windows and Android/iOS mobile 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 Rust libraries that serve as the backbone for Proton web and mobile applications.
Cross-platform compatibility: Ensure compatibility and optimal performance across various platforms including web browsers and mobile devices.
Code review and optimization: Conduct code reviews and provide constructive feedback to ensure code quality maintainability and performance optimization.
Collaboration: Work closely with frontend and mobile developers.
Security: Implement and adhere to best practices in secure coding to maintain the high level of security and privacy Proton is known for.
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.
Continuous learning: Stay updated on the latest advancements in Rust and related technologies to suggest improvements and innovations.

Job requirements:

Experience: 5 years of professional software development experience with a focus on Rust programming language.
Rust proficiency: Strong expertise in Rust language features concurrency and ownership model.
Web and/or mobile development: Experience in developing libraries for both web and mobile 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.
Security focus: Understanding of secure coding practices and a commitment to maintaining high levels of security and privacy.
Version control: Proficient in using version control systems preferably Git.
Bachelors or Masters degree: In Computer Science Software Engineering or a related field.

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.
• 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.
• 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 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 Protons 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. Read more about our impact here.

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.

Candidate Privacy Notice

When you apply for a position refer a candidate or are considered for a role at Proton Technologies AG (Proton we us or our) your information is stored in Greenhouse in accordance with theirService Privacy information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information we will either delete or anonymize it. Should 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 at

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.

To learn more about our privacy policy please visitour privacy policy page.

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