Senior Software Engineer, Firefox Security

Stack

Responsibilities

• ▹Contribute to improvements in Firefox's core security systems, focusing on cryptographic protocols, WebPKI, and security-sensitive web APIs
• ▹Design and implement web platform security features in collaboration with teammates and the broader web community
• ▹Improve browser reliability, performance, and resource efficiency
• ▹Analyze and improve memory usage in a complex, multi-threaded browser environment
• ▹Collaborate on security initiatives, debugging, and root cause analysis
• ▹Participate in 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 in security-sensitive environments
• ▹Strong debugging and problem-solving skills in multi-threaded, cross-platform native applications
• ▹Effective communication and collaboration with distributed teams
• ▹Growth mindset toward deepening expertise in browser security, cryptography, and systems programming
• ▹Familiarity with web technologies, interest or experience in Rust

Soft skills

About the company

Mozilla Corporation is the non-profit-backed technology company behind Firefox and other pioneering products, serving more than 225 million people monthly with a mission to build an internet for people, not companies.