66K–88K EUR / year
Senior Software Engineer, Privacy
BackendRemote — Netherlands
Published on 2026-10-22
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About this role
Build privacy and anti-tracking protections for Firefox, helping mitigate user tracking and phishing. Improve Gecko browser architecture and deliver performant, maintainable software for a large user base.
About the company
Mozilla builds open-source products and technologies, including Firefox, that prioritize privacy, security, and an open internet.
The team
Mozilla Privacy Team
Stack
C++RustJavaScriptGeckoFirefox
What you'll do
- Implement privacy, anti-tracking, and threat-intelligence protections in Firefox
- Make architectural improvements to Gecko
- Build performant, low-latency, maintainable code
- Collaborate asynchronously with a geographically distributed team
What we're looking for
- Bachelor’s degree in computer science, engineering, or a related field, or equivalent experience
- At least four years of C++ and Rust programming experience
- Strong background in memory safety, multithreaded systems, or raw data stream manipulation
- Ability to independently scope and deliver complex features within tight release windows
- Strong written and verbal communication skills
Nice to have
- Experience with Gecko, Chromium, WebKit, or browser runtime abstractions
- Understanding of web architecture, web privacy and security, and client-side data structures
- Experience or interest in ML pipelines for developer workflows
- Basic statistical modeling
- Python and SQL proficiency
- Previous contributions to Mozilla or its codebase
Benefits
- Performance-based bonus plan
- Retirement contributions with immediate vesting
- Quarterly company wellness days
- Country-specific holidays and a birthday day off
- One-time home office stipend
- Annual professional development budget
- Quarterly well-being stipend
- Paid parental leave