Proton in Barcelona is seeking a senior Android engineer to build privacy‑first products across Proton Pass, Payments, and VPN. You’ll develop high‑quality Android experiences using Kotlin and Jetpack Compose, collaborating with product, design, and cross‑team engineers to ship features with end‑to‑end ownership. Join a team focused on scalable architectures, performance, and security. You’ll contribute to a Rust‑backed core while delivering delightful user experiences for millions of users