Senior Android Software Engineer

London Source: WhatJobs

£90,000–£135,000

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.

Responsibilities

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

Qualifications

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

What We Offer

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