Senior Android Engineer - Privacy-First, Flexible Hours

Proton AG; Barcelona; On-site; EUR 60,000 - 110,000; Full time

Benefits offered by this job

Stock Options

Technology

Learning & Development

Employee Benefits

In-Person Collaboration

Food & Beverages

Transport Support

Flexible Working

Job summary

Proton Technologies AG in Barcelona is seeking a Senior Android Software Engineer to build privacy-first Android apps using Kotlin, Jetpack Compose, and a shared Rust core. You’ll contribute to scalable, high-quality mobile experiences used by millions.

You will own features end-to-end—from scoping and design to delivery and iteration—collaborating across product, design and engineering. A passion for performance, security, and delightful user experiences is essential, as is comfort navigating

Qualifications

• Extensive experience building Android apps in Kotlin.
• Strong Jetpack Compose and modern Android development practices.
• Experience taking end-to-end ownership from scoping to delivery.

Responsibilities

• Build and ship high-quality Android experiences.
• Collaborate with product, design, and engineers across teams.
• Define technical direction and ensure performance, reliability and scalability.

Skills

Kotlin

Jetpack Compose

Android architecture

Performance & multithreading

End-to-end ownership

Collaboration across teams

Mentoring engineers

Privacy & security

Rust core awareness

Tools

Android Studio

Git

Rust (core) interfaces

Job description

Proton Technologies AG in Barcelona is seeking a Senior Android Software Engineer to build privacy-first Android apps using Kotlin, Jetpack Compose, and a shared Rust core. You’ll contribute to scalable, high-quality mobile experiences used by millions.

You will own features end-to-end—from scoping and design to delivery and iteration—collaborating across product, design and engineering. A passion for performance, security, and delightful user experiences is essential, as is comfort navigating