Network Engineer

Job description

At Proton, we envision an internet where privacy is the default, and we’re building ways to help all people secure their digital lives and take control of their data. Proton was founded in 2014 by a group of scientists who met at the European Organization for Nuclear Research (CERN). And since its inception, the company has grown at a fast pace and today has over 40 million users.

Our principal product, Proton Mail, is the world’s largest secure email service. Our second product, Proton VPN, is one of the world’s most popular VPN services. Our vision is to build an internet platform for the protection of digital rights, and we are also developing additional products, including Proton Calendar, Proton Drive, and more to come.

Our users include New York Times journalists, some of the world’s largest corporations, and millions of ordinary citizens. The world is adopting our products at an accelerating pace. Whether it’s in New York, or at the front lines of the global struggle for freedom and democracy in Hong Kong, Belarus, and Myanmar, the work we do saves lives and is transforming the world. Our team is diverse and dynamic, representing over 30 different nationalities, with offices in Geneva, Zurich, Prague, London, Vilnius, Skopje, and Taipei, employing people around the world.


Purpose of the role

Proton VPN runs on a distributed architecture of Linux servers and a set of apps available on each major platform (Windows, Android, iOS, macOS, and Linux) that interact with our infrastructure.

As a member of the Proton VPN Quality Assurance team, you will work on maintaining the security, reliability, and availability of Proton VPN's clients' ecosystem, testing its functionality, improving its overall performance, and contributing to the development of new features.


What you will do

  • Collaborate with app developers to analyze various complex challenges related to (but not limited to) the networking stack of Linux, macOS, iOS, Android, and Windows system
  • Help developing innovative solutions to improve the connectivity, stability, performance, and resilience of ProtonVPN's infrastructure and extend its functionality
  • Contribute to existing open-source projects and/or creating new ones
  • You will act as a bridge between QA teams and R&D team

Job requirements

  • 4+ years of expertise with networking protocols and implementations
  • Similar expertise in network debugging and managing tools on GNU/Linux OS
  • A documented track record of contributions to system-level projects and applications
  • Good understanding of software engineering
  • Basic understanding of the principles of quality assurance
  • Expertise in Windows, macOS, or Android system development, as well as extensive experience working with Linux kernel, Windows drivers, or macOS system extensions development, are a huge plus


Why you should join Proton

  • Be part of a movement - Proton is not just a product or service but a community-driven movement united by a shared vision of online freedom. Our services are open source, audited, and supported by community contributions. We give back to our community by maintaining core encryption libraries and by supporting other organizations furthering the same goals as us.
  • Work with smart and dedicated people - Our team is diverse, collaborative, and tight-knit with people coming from all walks of life, including many of the world’s top academic institutions and organizations, such as MIT, Harvard, Stanford, Caltech, Cambridge, and ETH.
  • Join a strong brand - Our encrypted email service - Proton Mail - has grown to be a staple of online security and privacy. Proton has been featured in multiple popular television and film productions, such as Mr. Robot, Knives Out, Sounds of Metal, and more.
  • Grow with us - We’re one of Europe’s fastest-growing startups, doubling in size every year. Our growth gives you limitless career and educational opportunities as well as the opportunity to work side-by-side with many world-leading experts in their fields.
  • Have your voice heard - We value your opinion and encourage you to speak up and share your ideas and thoughts. At Proton, no problem is someone else’s problem. We collectively strive to do the right thing and be the undisputed best in the world at everything we do.


Proton uses the Recruitee recruitment platform for a more effective hiring process and a better candidate experience. Your data will always be kept confidential and is not shared with any third parties. Keep in mind that you will receive emails from the email address careers@protonmail.recruitee.com or other addresses on the protonmail.recruitee.com domain.

Proton does not accept unsolicited resumes from any sources other than directly from a candidate. Proton will not pay a fee for any placement resulting from the receipt of an unsolicited offer, even in a situation when the relevant candidate is employed by Proton.