Android Developer (Inbox)

Join Proton and build a better internet where privacy is the default Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundamental human right . Since then, we’ve built the world’s largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar—tools used by millions globally to protect their freedom, fight censorship, and keep their data safe. In some situations, Proton has literally helped save lives.

We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants. Our 500+ team members across 50+ countries come from leading organizations and elite academic backgrounds. We move fast, keep hierarchy light, and prioritize impact over optics.

If you want to do meaningful work with exceptionally high-caliber people, this is it. Join us and do work you can truly be proud of. Check our open-source projects here !

Role overview As a fullstack cross-platform Android Engineer, you'll play a pivotal role in developing Proton Inbox (which comprises of Mail and Calendar) 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.

Key Responsibilities

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: you'll be comfortable with scoping projects, walking back from deadlines and being able to discern the important from the superfluous Foster a culture of innovation by exploring new technologies, methodologies and approaches to mobile development – we tackle complex engineering challenges with creativity and ingenuity Optimise 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 of mobile applications Design for scalability, considering factors such as data caching, network bandwidth and server load Prioritise customer satisfaction by maintaining a customer-centric mindset throughout the development process, continuously seeking feedback and iterating to improve the user experience The ideal candidate will bring 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 when it comes to engineering mobile applications Previous experience working in a fast-paced, scale-up environment Even if you don’t meet all the

Requirements

listed above but feel you could still be a great fit, please do apply.

What We Offer

Work that Matters: millions of people trust Proton with their privacy. We answer only to our users — not advertisers, not investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable.

(read more about our impact here ) Technology: you'll get the right hardware and the right software you need to do your best work. Learning Development: we invest in your growth because sharp people make us better. Proton is one of the fastest ways to accelerate your career because you'll be thrown into real challenges, with real ownership, from day one.