Senior Software Engineer, Firefox Security
Mozilla is hiring a Senior Software Engineer for Firefox Security to advance Firefox's security architecture and cryptography stack, with a focus on cryptographic protocols, WebPKI, and security-sensitive web APIs. The role involves designing and shipping standards-based web platform security features and improving browser reliability, performance, and memory efficiency. This is a remote position (hiring range for France: €53.000-€71.000 EUR).
Responsibilities
- ▹Advance Firefox's security architecture and cryptography stack, focusing on cryptographic protocols, WebPKI, and security-sensitive web APIs
- ▹Design and implement standards-based, secure, and interoperable web platform security features
- ▹Improve browser reliability, performance, and resource efficiency, including memory usage in a multi-threaded environment
- ▹Collaborate on security initiatives through debugging, root cause analysis, and long-term solutions
- ▹Contribute to technical design, design reviews, and project planning for security-related initiatives
Requirements
- ▹Strong software engineering and security fundamentals, with proficiency in C/C++
- ▹Solid understanding of security principles, including cryptographic protocols and implementations
- ▹Ability to design, implement, test, and maintain software in large-scale or security-sensitive environments
- ▹Strong debugging and problem-solving skills in multi-threaded, cross-platform native applications, including performance and memory challenges
- ▹Collaborative and effective communicator with distributed teams
- ▹Growth mindset and willingness to deepen expertise in browser security, cryptography, and systems programming
- ▹Familiarity with web technologies and interest or experience in Rust, comfortable in large multi-language codebases
Nice to have
- ▹Interest or experience in Rust
- ▹Experience with WebPKI and public key infrastructure on the web
Soft skills
What we offer
- ▹Performance-based bonus plans for all eligible employees
- ▹Rich medical, dental, and vision coverage
- ▹Generous retirement contributions with 100% immediate vesting
- ▹Quarterly all-company wellness days
- ▹Country-specific holidays plus a day off for your birthday
- ▹One-time home office stipend
- ▹Annual professional development budget
- ▹Quarterly well-being stipend
- ▹Considerable paid parental leave
- ▹Employee referral bonus program
- ▹Life/AD&D, disability and EAP benefits (varies by country)
- ▹Hiring range for France: €53.000-€71.000 EUR
About the company
Mozilla Corporation is the non-profit-backed technology company behind Firefox, the privacy-minded web browser, with more than 225 million people using its products each month. Wholly owned by the non-profit Mozilla Foundation, the company is mission-driven rather than beholden to shareholders, and builds open-source software with a globally distributed team.