68K–91K EUR / year
Senior Software Engineer, Firefox Security
OtherRemote — Germany
Published on 2026-10-14
These details were extracted automatically from the original listing. They may not be complete or fully up to date — it's worth checking the original job post.
About this role
Build and ship security and hardening features for Firefox, strengthening browser protections for enterprise users. Work across operating systems and teams to improve security architecture while addressing reliability, performance, and memory issues.
About the company
Mozilla builds open-source products and technologies, including Firefox, that prioritize privacy, security, and an open internet.
Stack
CC++RustHTMLCSSJavaScript
What you'll do
- Design, implement, test, and ship Firefox security and hardening features
- Improve security architecture, including privilege isolation, trust boundaries, cryptographic protocols, WebPKI, and security-sensitive web APIs
- Investigate security issues, identify root causes, and deliver maintainable fixes across teams
- Diagnose stability, correctness, performance, and memory issues in a multithreaded browser
What we're looking for
- 3+ years of low-level software engineering experience
- Strong proficiency in C and/or C++ and a solid understanding of security fundamentals
- Experience debugging multithreaded, cross-platform native applications, including memory and performance issues
- Familiarity with web technologies and ability to work in large, complex, multi-language codebases
- Clear written and verbal communication and experience collaborating with distributed teams
Nice to have
- Interest or experience in Rust
Benefits
- Performance-based bonus plan
- Retirement contributions with immediate 100% 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