About ProtonJoin Proton and build a better internet where privacy is the default. Proton was founded in 2014 by scientists from CERN on a simple truth:
privacy is a fundamental human right. Since then, we have built the world's largest encrypted email service and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar—tools used by millions globally to protect their freedom, fight censorship, and keep their data safe. In some situations, Proton has literally helped save lives We are profitable, independent (no VC control), and selectively hire from the top 1% of applicants. Our 500+ team members across 50+ countries come from leading organizations and elite academic backgrounds. We move fast, keep hierarchy light, and prioritize impact over optics. If you want to do meaningful work with exceptionally high-caliber people, this is it. Join us and do work you can truly be proud of. Check our open-source projects here
The TeamWe're a tight-knit, passionate Android engineering team building privacy‑first apps trusted by millions of people around the world. Our code is open source, so your work is truly out there making a difference. We move fast, skip the bureaucracy, and genuinely care about what we ship. Whether you're deep in Espresso tests or debating architecture over lunch, you'll be surrounded by people who are as excited about quality as you are. If you love Android, hate flaky tests, and want your work to actually matter — you'll fit right in.
Tech Stack and ToolsKotlin, Java, Espresso, UI Automator, Maestro
What You Will Do
Design, develop, and maintain automated test frameworks and pipelines for Proton's Android applications
Write and execute UI, functional, integration, and end‑to‑end test suites using modern Android testing tools and best practices




Work hand‑in‑hand with Android developers to define testability requirements and embed automated tests into CI/CD workflows
Hunt down bugs, document them clearly, and collaborate with the team to get them fixed fast
Perform exploratory and risk‑based testing with a sharp eye on privacy, data integrity, and security behavior
Own and evolve the Android test infrastructure, including emulator farms, device labs, and test environment configurations
Dig into test results, spot patterns, and turn findings into actionable improvements that raise the quality bar
Champion QA best practices across the team and help shape how we think about quality at every stage of development
Review test code with the same rigor as production code — maintainability and scalability matter here
Keep up with the Android ecosystem, new testing frameworks, and open‑source tooling so we're always ahead of the curve
What We Are Looking For
3–5 years of hands‑on experience in Android test automation, ideally on consumer‑facing apps with a large user base
Strong proficiency in Kotlin and/or Java, with solid experience writing clean, maintainable test code
Proven experience with Android testing frameworks such as Espresso, UI Automator, or Maestro
Good understanding of CI/CD pipelines and experience integrating Android tests with tools like GitLab CI, GitHub Actions, or similar




Familiarity with Android emulators, physical device testing, and cloud‑based device farms (e.G., Firebase Test Lab)
Comfortable navigating Android Studio, ADB, and the broader Android development toolchain
Experience with version control using Git, and a natural fit in an open‑source collaborative workflow
A good nose for security and privacy issues — understanding of privacy‑by‑design is a real plus
Ability to read and understand application source code to sharpen test coverage and catch edge cases early
Sharp analytical mindset with a structured, detail‑oriented approach — you don't let things slip through the cracks
Great communicator who thrives in a remote‑friendly, internationally distributed team
Genuine enthusiasm for open‑source software, Android, and building technology that protects people's privacy
What We Offer
Work that Matters: millions of people trust Proton with their privacy. We answer only to our users — not advertisers, not investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable. (read more about our impact here)
Stock Options: at Proton, we all have the opportunity to be owners of the company. From day one, you have a real stake in what we're building. When Proton wins, you win.
Technology: you'll get the right hardware and the right software you need to do your best work.
Learning & Development: we invest in your growth because sharp people make us better. Proton is one of the fastest ways to accelerate your career because you'll be thrown into real challenges, with real ownership, from day one.
Employee Benefits: your wellbeing isn't an afterthought. We offer

📌 Android Test Automation Engineer (Madrid)
🏢 Proton
📍 Madrid