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. 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 towar

📌 Senior Android Software Engineer (España)
🏢 proton tehnologies
📍 España