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# Senior Android Software Engineer - London

- **Company:** Proton AG
- **Location:** London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Android Software Development, Cloud Storage, Memory Management, Sync (Unix), Multithreading, Caching, Kotlin, Jetpack Compose
- **Published:** July 22, 2026
- **Apply:** https://uk.indeed.com/viewjob?jk=58e7289dd4500af7

## About the Role

* 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 experience taking end-to-end ownership of features, from scoping and technical design through to delivery and iteration
 * You have strong experience building maintainable, scalable, and testable mobile architectures
 * You are comfortable working across large codebases and collaborating across multiple teams
 * You have experience mentoring engineers and raising the technical bar within a team
 * 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
 * You are comfortable navigating ambiguity and contributing to product and technical discussions
 * Experience with privacy, security, encryption, sync systems, or offline-first architectures is a strong plus
 * Rust experience is a plus, but not required, as we continue moving towards a platform-independent Rust logical core that communicates with our Android applications through generic interfaces

## Description

Based in our London office, you'll join one of several high-impact product teams across Proton Drive, Payments and Account, helping build privacy-first products used by millions around the world. Whether it's encrypted cloud storage, secure account infrastructure, or the future of private financial tools, 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. You'll take end-to-end ownership of your work and help define what "great" looks like for privacy-focused consumer products at scale.


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