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R+D Engineer (Barcelona)

Proton

barcelona, cataluña, Spain Full-time June 17, 2026

Found Description

What you will do:

  • Being an active member of the ProtonVPN R&D team.
  • Collaborating with app developers to solve complex networking challenges across Linux, macOS, iOS, Android, and Windows platforms.
  • Helping develop innovative solutions to improve the connectivity, stability, performance, scalability, security, and resilience of ProtonVPN's infrastructure and client software, and extend their functionality.
  • Contributing to existing open-source projects or creating new ones.

What we are looking for:

  • Expert-level knowledge of operating system internals.
  • Expertise with network protocols and implementation.
  • A documented track record of contributions to system-level projects and applications.
  • Experience with software development.
  • Understanding of the principles of quality assurance.

Bonus points for:

  • Expertise in Windows, macOS, or Linux system developmen...

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