Flutter Developer

Job description

Our company:

At Proton Technologies AG, 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 Technologies AG 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, ProtonMail, is the world’s largest secure email service. Our second product, ProtonVPN, 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 ProtonCalendar, ProtonDrive, and more to come.

Our users include leaders of the Hong Kong protest movement, New York Times journalists, some of the world’s largest corporations, and millions of ordinary citizens from over 180 countries. Our team is diverse and dynamic, representing over 30 different nationalities, with offices in Geneva, Zurich, Prague, Vilnius, Skopje, and Taipei. We're also considering future potential office locations such as London and Barcelona.

What you will do:

You will contribute to the development effort for existing and future ProtonMail and ProtonVPN for mobile devices. This includes interacting with our existing backend REST APIs, providing feedback based on mobile needs, and working with our web, backend, and server teams to build new features. You will also coordinate with our QA/Support team to analyze our Flutter apps and assist with debugging them. 


Job requirements

  • 5+ years of experience in software development (with a strong command of OOP, data structures, and algorithms) of which at least 2 years of mobile development with Flutter
  • Fluent with Flutter and Android or iOS development
  • Excellent knowledge of async programming (including isolates)
  • Knowledge of the latest trends and libraries in the Flutter ecosystem
  • Working knowledge of RESTful web APIs and complex systems
  • Knowledge of Git or other source control
  • Experience with automated testing, Continuous Integration, and Development

Bonus points for:

  • Well-versed in IT security, with a good understanding of security best practices for mobile app development
  • Leadership experience
  • Created or worked on highly-rated apps in the Google Play Store with a large number of downloads
  • Experience working with a large number of files and/or cloud storage technology
  • Experience with Agile methodologies and processes


Why you should join Proton Technologies AG:

  • We work on interesting, challenging problems every day. There is never a dull moment.
  • Our startup culture means everyone’s opinion matters. You can have a significant impact.
  • Our rapid growth means there are many opportunities for advancement.
  • The chance to do something meaningful. Our products protect 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 Technologies AG 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.