Senior .NET Developer (Desktop/SDK)

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 Tech’s 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 information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations. Proton today supports over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's 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. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. Proton has become profitable and reached scale without relying upon VC funding, largely due to superior talent that allows us to do things faster, more creatively, and more efficiently. 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 our social media pages to learn more about us: Twitter , Reddit , Instagram . The role: You will be responsible for designing, building, maintaining and evolving the sync SDK powering Proton Drive's desktop applications. This includes not only building the application internals (managing and syncing local and remote state, performing cryptographic operations, etc) but also helping us to build resilient, scalable applications (graceful degradation; log and metrics streams free of personally identifiable information). You will be involved in the entire application lifecycle, but with a strong focus on the internals shared amongst our desktop applications, including Gitlab configuration, deployments, monitoring and alerting, and operational incident response. While this position is not a "full-stack" position, you will be expected to collaborate with backend engineers to drive any necessary changes and/or new features needed for the core of our desktop experience. What you will do: Be part of a small team working to bring a "privacy by default" solution to our Drive clients on Windows, macOS and Linux. Develop applications that delight a wide range of users, from layperson to technical, and gives confidence that their online privacy is in good hands - while getting the complexity of end-to-end encryption out of the way. Invest in test automation to improve the team's productivity and software delivery cadence. Think critically on how to divide problems into iterations of simpler, composable solutions. Re-evaluate the minimum scope as necessary to meet objectives on-time. Insist on high standards for application monitoring and alerting, in order to ensure a smooth customer experience at all times. We are looking for: Strong experience in .NET development Strong experience with concurrent multi-threaded programming Optional experience building and maintaining desktop applications Working knowledge of file systems Working knowledge of Git Bachelor's or master’s degree in a relevant field of study Expe…