Senior .NET Developer (Desktop/SDK) at Proton in Geneva

Keywords

• .NET
• Desktop
• Sync SDK
• Privacy
• C#
• Git

Summary

Proton is looking for a Senior .NET Developer to design and maintain the sync SDK for its desktop applications. You will work on resilient, scalable software with a strong focus on privacy and security.

Job Description

Proton is a privacy-focused organization founded by CERN scientists, dedicated to providing free and open-source technology that protects user data. With over 100 million users worldwide, the company operates without venture capital funding, relying on a talented team to build secure solutions like Proton Mail, VPN, Drive, and Pass. As a Senior .NET Developer, you will join a small, high-performing team responsible for the core internals of Proton Drive's desktop clients on Windows, macOS, and Linux.

Your tasks

• Design, build, and maintain the sync SDK that powers Proton Drive's desktop applications.
• Develop application internals, including managing local and remote state and performing cryptographic operations.
• Build resilient and scalable applications with graceful degradation and monitoring streams free of personally identifiable information.
• Collaborate with backend engineers to drive necessary changes for the desktop experience.
• Invest in test automation to improve productivity and software delivery cadence.
• Ensure high standards for application monitoring, alerting, and operational incident response.

Your profile

• Strong experience in .NET development and concurrent multi-threaded programming.
• Working knowledge of file systems and Git.
• Experience owning and maintaining large software components.
• Familiarity with gradual rollouts and metrics, monitoring, and alerting frameworks.
• A bachelor's or master's degree in a relevant field.
• Optional experience in building and maintaining desktop applications.

What we offer

• Office-first collaboration in Geneva with up to 30% remote work allowed.
• Stock options, as all employees are owners of the company.
• Subsidized public transport, bike allowances, or parking spaces.
• Daily lunch and snacks provided at the office.
• Comprehensive health insurance, retirement savings options, and generous vacation policies.
• Access to learning opportunities, training programs, and conferences.