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R+D Engineer (Barcelona)

Sin nombre

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

Found Description

Job Overview

As a member of the ProtonVPN Research and Development team, you will maintain the security of ProtonVPN’s infrastructure and improve its overall performance. Your work will involve coding in C or Rust, scripting in Python or Lua, creating patches for the Linux kernel, or debugging system‑level issues across multiple operating systems.

What you will do

  • Act as an active member of the ProtonVPN R&D team.
  • Collaborate with app developers to solve complex challenges related to networking stacks on Linux, macOS, iOS, Android, and Windows systems.
  • Help develop innovative solutions to improve connectivity, stability, performance, scalability, security, and resilience of ProtonVPN’s infrastructure and client software, and extend their functionality.
  • Contribute to existing open‑source projects or create new ones.

What we are looking for

  • Expert‑level knowledge of operating‑system internals.

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