Software Engineer – Browser Team (Geneva/Zürich)

About the role

Join Proton's browser product team to build a privacy‑first internet browser used by millions worldwide. Based in our Geneva (or Zürich) office, you will work on a technically ambitious, desktop‑focused product that delivers fast, secure, and distraction‑free browsing.

Key responsibilities

• Design, develop, and ship features for a Chromium‑based browser on macOS, Windows, and Linux.
• Collaborate closely with product, design, and senior engineers to ensure high‑quality user experiences.
• Implement privacy and security hardening such as anti‑fingerprinting, content blocking, and telemetry reduction.
• Maintain and improve large codebases including Blink, V8, networking, sandboxing, and extensions.
• Contribute to open‑source components and explore platform‑independent modules in Rust.

Required profile

• Hands‑on experience building or maintaining a Chromium‑based browser.
• Proficiency in C++ and comfort navigating large, complex codebases.
• Familiarity with Chromium’s build system and cross‑platform development (macOS, Windows, Linux).
• Practical experience with privacy or security hardening techniques.
• Strong knowledge of web platform standards and browser security responsibilities.
• Ability to work autonomously in a small, high‑ownership team; open‑source contributions are a plus.

Required skills

• C++
• Chromium (Blink, V8, network stack, sandboxing, extensions)
• Cross‑platform build systems (macOS, Windows, Linux)
• Privacy/security hardening (anti‑fingerprinting, content blocking, telemetry reduction)
• Web platform standards
• Rust (optional)

What we offer

• Impactful work protecting the privacy of millions of users.
• Stock‑option program giving you ownership in the company.
• Opportunity to work with cutting‑edge browser technology and a high‑caliber team.