Android Developer; Inbox

Join to apply for the Android Developer (Inbox) role at Proton.

Join Proton and build a better internet where privacy is the default.

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security and freedom online. Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive and Proton Pass.

These tools empower individuals and organisations to take control of their personal data, break away from Big Tech’s invasive practices and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations.

Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries. We value intelligence, learning potential and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online. Hiring at Proton is highly selective, with less than 1% of candidates hired.

You’ll have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions.

We have a global mindset and big ambitions but remain a start‑up  value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our open-source projects here!

As a full‑stack cross‑platform Android Engineer, you’ll play a pivotal role in developing Proton Inbox using Jetpack Compose and Rust. You’ll use an end‑to‑end ownership approach, ensuring timely delivery of high‑quality, scalable solutions that will delight our customers.

• Develop and maintain cross‑platform mobile applications for Android using a blend of cross‑platform (Rust) and native technologies (Kotlin).
• Take end‑to‑end ownership of mobile application development projects: scope projects, walk back from deadlines and discern the important from the superfluous.
• Foster a culture of innovation by exploring new technologies, methodologies and approaches to mobile development.
• Optimize mobile applications for performance, usability and responsiveness across different devices and screen sizes.
• Master memory management, multithreading and concurrency mechanisms to enhance performance and responsiveness.
• Design for scalability, considering data caching, network bandwidth and server load.
• Prioritize customer satisfaction by maintaining a customer‑centric mindset, continuously seeking feedback and iterating to improve the user experience.

• Bachelor’s degree in Computer Science, Engineering or related field (or equivalent work experience).
• Excellent problem‑solving skills and the ability to think outside the box to overcome challenges.
• Passion for continuous learning and driving change in the rapidly evolving field of mobile development.
• Excellent communication and interpersonal skills.
• Proven experience developing mobile applications for Android using Kotlin.
• Proficiency with Jetpack Compose for Android and familiarity with Rust.
• Strong understanding of mobile app architecture, design patterns and best practices.
• Knowledge of memory management techniques and best practices.
• Experience with multithreading and concurrency in mobile applications.
• Good understanding of scalability considerations.
• Previous experience working in a fast‑paced, scale‑up environment.

Even if you don’t meet all the requirements above but feel you could still be a great fit, please do apply.

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