Senior Software Engineer, Firefox Security

Stack

Responsibilities

• ▹Advance Firefox's security architecture and cryptography stack, focusing on cryptographic protocols, WebPKI, and security-sensitive web APIs
• ▹Design and implement web platform security features with teammates and the broader web community
• ▹Improve browser reliability, performance, and resource efficiency; analyze memory usage in a multi-threaded environment
• ▹Collaborate on security initiatives, debugging, and root cause analysis
• ▹Contribute to technical design, design reviews, and project planning

Requirements

• ▹Strong software engineering and security fundamentals, proficiency in C/C++, understanding of cryptographic protocols
• ▹Experience building and maintaining complex software systems in large-scale or security-sensitive environments
• ▹Strong debugging and problem-solving skills in multi-threaded, cross-platform native applications
• ▹Effective communication and collaboration with distributed teams
• ▹Familiarity with web technologies, interest or experience in Rust
• ▹Comfortable in large, complex, multi-language codebases

Nice to have

• ▹Rust experience

Soft skills

About the company

Mozilla Corporation is the non-profit-backed technology company behind Firefox, shaping the internet for over 25 years with more than 225 million monthly users and thousands of volunteer contributors building open-source software.