Senior Android Developer

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. ProtonMail 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 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.

Proton is a mission driven company. We’re deeply committed to enabling freedom online and ensuring the internet serves the interests of all people. Our technologies provide trusted ways for people to be secure online and in control of their information at all times. The world is adopting our products at an accelerating pace. Help us bring it from tens of millions of users, to billions of users. We’re creating one of the world’s most impactful tech companies.



Purpose of the role

You will contribute to the development effort for existing and future ProtonMail and ProtonVPN for Android 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 Android apps and assist with debugging them. 

Job requirements

  • 8+ years of experience in software development (with a strong command of OOP, data structures and algorithms) of which at least 5 years of extensive Android development
  • Fluent with Java and Kotlin and Coroutines
  • Excellent knowledge of multithreading
  • Knowledge of latest trends and libraries in Android 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

  • 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. ProtonMail 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.


ProtonMail 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.