Senior Software Engineer, Firefox Security

Requirements:

• Strong software engineering and security fundamentals
• Experience building and maintaining complex software systems
• Strong debugging and problem-solving skills
• Collaborative and effective communicator
• Growth mindset and willingness to learn
• Web platform and modern systems experience

What you'll be doing:

• Advance Firefox's security architecture and cryptography stack: Contribute to improvements in Firefox's core security systems, with a focus on cryptographic protocols, WebPKI, and security-sensitive web APIs.
• Design and implement web platform security features: Develop and ship web platform features in collaboration with teammates and the broader web community.
• Improve browser reliability, performance, and resource efficiency: Investigate and resolve issues impacting stability, correctness, and performance.
• Collaborate on security initiatives: Partner with engineers across teams to identify, prioritize, and address security issues.
• Contribute to technical design and planning: Participate in technical discussions, design reviews, and project planning for security-related initiatives.

What you'll get:

• Generous performance-based bonus plans to all eligible employees - we share in our success as one team
• Rich medical, dental, and vision coverage
• Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
• Quarterly all-company wellness days where everyone takes a pause together
• 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
• Other benefits (life/AD&D, disability, EAP, etc. - varies by country)