Senior Android Software Engineer - Barcelona About Proton 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. Join Proton and build a better internet where privacy is the default We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants. If you want to do meaningful work with exceptionally high-caliber people, this is it. Check our open-source projects here ! The Role Based in our Barcelona office, you’ll join one of several high-impact product teams across Proton Pass, Payments, and Proton VPN, helping build privacy-first products used by millions around the world. From secure password management and identity protection to encrypted financial tools and internet freedom products that help users bypass censorship and surveillance, you’ll work on technically ambitious products with real-world impact. As a senior engineer, you’ll collaborate closely with product, design, and engineers across Proton to build and ship high-quality Android experiences using Kotlin, Jetpack Compose, and an increasingly shared Rust core, helping define what “great” looks like for privacy-focused consumer products at scale.



You have extensive experience building and shipping high-quality Android applications using Kotlin You have strong experience with Jetpack Compose and modern Android development practices You care deeply about product quality, usability, and delivering exceptional user experiences You have a strong understanding of performance, concurrency, multithreading, and mobile memory management You understand mobile scalability considerations, including caching, network usage, responsiveness, and offline behaviour Rust experience is a plus, but not required, as we continue moving towards a platform-independent Rust logical core that communicates with our Android applications through generic interfaces Technology: you'll get the right hardware and the right software you need to do your best work. We offer strong health coverage, solid retirement options, generous leave, and wellness support so you can bring your best self to work every day Transport: getting to the office shouldn't cost you. Versátil Working: you own your schedule. If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know. Candidate privacy notice When you apply for a position, refer a candidate or are considered for a role at Proton Technologies AG (Proton, we, us or our), your information is stored in Greenhouse, in accordance with its Service Privacy Policy . We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills. If we no longer have a legitimate business need to process your information, we will either delete or anonymise it. Should you have any inquiries about how we use or manage your information or if you wish to access, correct or delete your data, please contact our privacy team at .

📌 Senior Android Software Engineer - Barcelona
🏢 Proton
📍 Barcelona