Senior Android Software Engineer - Barcelona
Core
Senior Android engineer building privacy-first consumer products (encrypted email, VPN, password manager, calendar) used by millions globally.
Role type
Senior IC Android Software Engineer
Builds
Proton Pass, Proton Payments, Proton VPN, Proton Calendar
Domain
Consumer privacy/security / Mobile (Android)
Deliverable
production ML models | product features
Required skills
Kotlin, Jetpack Compose, modern Android development, end-to-end feature ownership, scalable mobile architecture, performance optimization, concurrency, multithreading, mobile memory management, caching, network usage, offline behavior
Preferred skills
privacy/security/encryption, sync systems, offline-first architectures, Rust
Technologies
Kotlin, Jetpack Compose, Rust
Responsibilities
Collaborate with product, design, and engineering teams to build and ship high-quality Android experiences; define technical standards for privacy-focused consumer products at scale; mentor engineers and raise the technical bar within the team.
Seniority
Senior, hands-on IC