.A better internet, where privacy is the default, is possible. Building this better internet might seem daunting or even unthinkable, but at Proton, this is what we do every day.Proton was founded in 2014 by a group of scientists who met at the European Organization for Nuclear Research (CERN). Our first product, Proton Mail, is now the world's largest encrypted email service. Subsequent Proton products, such as Proton VPN, Proton Calendar, Proton Drive, and Proton Pass give our users full control over how and with whom their data is shared.Today, Proton makes privacy universally accessible. Journalists from outlets like The Guardian and The New York Times, some of the world's largest organizations, and people in more than 180 countries have signed up for over 100 million accounts. Our diverse and dynamic team is made up of more than 400 members representing over 40 different nationalities. While we are based in Geneva, Switzerland, we have offices in Zurich, Prague, London, Vilnius, Skopje, Taipei, Barcelona, Paris and many more employees working remotely around the world.Join one of Europe's fastest-growing companies to help us solve challenging problems and build new products that will reach hundreds of millions of people. We want to create more than just one of the world's most impactful tech companies; we want to create a newinternet that serves the interests of all people. We need you, your voice, your ideas, and your ambition to make it happen.Purpose of the role:As a Rust Developer on our Engineering Transformation team, you will play a crucial role in designing, implementing, and maintaining components that power Proton Mail and Calendar platforms. You will work collaboratively in a cross-functional team, including backend API, web frontend, 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 Mail's 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 to integrate core libraries seamlessly into Proton Mail's applications.Security: Implement and adhere to best practices in secure coding to maintain the high level of security and privacy Proton Mail 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