Senior Android Engineer — Cross‑Platform (Jetpack Compose + Rust)

Proton; Barcelona; Hybrid; EUR 70,000 - 95,000; Full time

Benefits offered by this job

Stock options

Flexible working hours

Global offices (Geneva, Zurich, Prague

Barcelona office

Job summary

Proton is building a privacy‑first internet experience and offers Proton Mail, Proton VPN, Proton Drive and more. We are seeking a senior Android engineer to own mobile development for Proton Pass and SimpleLogin, combining Kotlin and Rust.

You will take end‑to‑end ownership of the mobile stack, drive performance, scalability and a strong user experience across devices. Join a global team with offices in several cities and a flexible hybrid work model.

Qualifications

• Bachelor's degree in Computer Science, Engineering or related field (or equivalent work experience).
• 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.

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 development projects and manage scoping and deadlines.
• Foster innovation by exploring new technologies and approaches to mobile development.
• Optimize mobile applications for performance, usability and responsiveness across devices and screen sizes.
• Master memory management, multithreading and concurrency to enhance app performance.
• Design for scalability considering data caching, network bandwidth and server load.
• Prioritize customer satisfaction by maintaining a customer-centric mindset and iterating on feedback.

Skills

Kotlin

Jetpack Compose

Rust

Android

Memory management

Multithreading

Concurrency

Architecture patterns

Scalability

Fast-paced environment

Education

Bachelor's degree in Computer Science or related field

Tools

Jetpack Compose

Job description

Proton is building a privacy‑first internet experience and offers Proton Mail, Proton VPN, Proton Drive and more. We are seeking a senior Android engineer to own mobile development for Proton Pass and SimpleLogin, combining Kotlin and Rust.

You will take end‑to‑end ownership of the mobile stack, drive performance, scalability and a strong user experience across devices. Join a global team with offices in several cities and a flexible hybrid work model.