Senior Android Software Engineer

Overview

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.

• Collaborate with product, design, and engineering teams to build and ship Android experiences using Kotlin, Jetpack Compose, and Rust
• Take end-to-end ownership of features from scoping and technical design through delivery and iteration
• Contribute to maintainable, scalable, and testable mobile architectures
• Navigate large codebases across multiple teams
• Mentor engineers and raise the technical bar within the team
• Focus on performance, concurrency, multithreading, and mobile memory management
• Address mobile scalability considerations, including caching, network usage, responsiveness, and offline behavior
• Engage in product and technical discussions to handle ambiguity

• Extensive experience building and shipping high-quality Android applications using Kotlin
• Strong experience with Jetpack Compose and modern Android development practices
• Commitment to product quality, usability, and exceptional user experiences
• Experience owning features end-to-end from scoping to delivery and iteration
• Experience building maintainable, scalable, and testable mobile architectures
• Ability to work across large codebases and collaborate across multiple teams
• Experience mentoring engineers
• Strong understanding of performance, concurrency, multithreading, and mobile memory management
• Understanding of mobile scalability, including caching, network usage, responsiveness, and offline behavior
• Ability to navigate ambiguity and contribute 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
• Open to applicants who may not meet all listed requirements but could still be a great fit

• Impactful work: millions trust Proton with their privacy, with autonomy from external pressures
• Stock options and ownership from day one
• Technology: appropriate hardware and software for your role
• Learning & Development: growth opportunities and real challenges
• Employee benefits:
  
  health coverage, retirement options, generous leave, wellness support
• In-person collaboration: offices in Geneva, Zürich, Barcelona, London, and more
• Food: lunch and snacks in offices
• Transport: coverage for public transport, bike allowances, or parking
• Flexible working: set hours that focus on outcomes

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy.