Windows Software Engineer

Job description

We are looking for an enthusiastic Windows software engineer to become part of our ProtonVPN team.

ProtonVPN clients support all major platforms, including Windows. We want to build a secure product that is competitive on usability, functionality, and stability, to offer our users the best VPN experience.

You will improve and extend the ProtonVPN client by building user interfaces, optimizing network protocols, and creating Windows kernel drivers. You will also work in close collaboration with the entire ProtonVPN development team on any outstanding projects. The ideal candidate thrives in a challenging environment that requires a variety of skills.


What You will do:

You will be an active part of the ProtonVPN Windows team through tasks including, but not limited to:

  • Collaborating in the analysis of complex challenges related to various aspects of a Windows system, related but not limited to its networking stack
  • Taking part in the development of innovative solutions to improve the interface, usability, connectivity, stability, performance, and resilience of ProtonVPN and extend its functionality
  • Taking part in extending existing open source projects or in creating new ones


Job requirements

  • Expert-level knowledge of Windows
  • Good knowledge of the C# ecosystem
  • A documented track record of contributions to multiple Windows projects and applications
  • Strong software engineering skills
  • Knowledge of the networking stack (especially on the Windows environment)
  • Basic understanding of the principles of quality assurance

 Knowledge in the following areas is considered a plus:

  • Windows Kernel driver development
  • VPN protocols such as OpenVPN, IKEv2 or WireGuard
  • Windows system administration
  • Code debugging and profiling
  • HTTPS certificates and public key infrastructure
  • Agile methodologies and frameworks
  • Open source software development


Why work at Proton?

  • Our startup culture means everyone’s opinion matters. You can have a significant impact.
  • We work on interesting, challenging problems every day. There is never a dull moment.
  • Our rapid growth means there are many opportunities for advancement
  • The chance to do something meaningful. Proton protects dissidents, journalists, and activists. Our work saves lives.
  • Be part of something bigger. Millions of people and businesses around the world have embraced our idea of an Internet where privacy and security are the default. Join the privacy revolution that is changing the world.


Proton is using Recruitee recruitment platform for more effective hiring and better candidate experience. Your data will be kept confidential and not shared with any third parties.

Keep in mind that you will receive emails from careers@protonmail.recruitee.com email or other addresses on the protonmail.recruitee.com domain.