Requirements

• 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 behavior
• 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

Nice to Haves

• 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

What You'll Be Doing

• Based in our Paris office, you’ll join one of several high-impact product teams focused on Inbox (Proton Mail and Calendar), Proton Account, Lumo, and Meet
• You'll help build the foundational experiences that power Proton’s ecosystem and the next generation of privacy-first products
• 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

Perks and Benefits

• Work that Matters: millions of people trust Proton with their privacy
• Stock Options: opportunity to be an owner of the company
• Technology: get the right hardware and software needed for your best work
• Learning & Development: investment in your growth
• Employee Benefits: strong health coverage, retirement options, generous leave, and wellness support
• In-Person Collaboration: collaborate face-to-face with passionate individuals
• Food: lunch and snacks provided daily
• Transport: public transport, bike allowances, or parking covered
• Flexible Working: own your schedule for better outcomes