Senior Software Engineer, Firefox Security

This is a fully remote position, open to applicants in Sweden.

📋 Description

• Design, develop, test, and deploy security and hardening features that enhance the security framework of Firefox for enterprise users.

• Contribute to and lead enhancements to Firefox’s core security framework by implementing privilege isolation and redefining trust boundaries.

• Refine Firefox’s fundamental security mechanisms, which include cryptographic protocols, WebPKI, and security-sensitive web APIs.

• Collaborate with multiple teams to investigate security vulnerabilities, identify root causes, and provide robust, maintainable solutions.

• Analyze and resolve issues that impact stability, accuracy, performance, and memory usage within a complex, multithreaded environment.

⛳️ Requirements

• Over 3 years of experience in low-level software engineering.

• Strong expertise in C and/or C++.

• Comprehensive understanding of security principles.

• Proven experience in diagnosing and resolving issues in multithreaded, cross-platform native applications.

• Experience in tackling memory and performance challenges.

• Familiarity with web technologies, including HTML, CSS, and JavaScript.

• Interest in or experience with Rust.

• Capability to work effectively within large, intricate, multi-language codebases.

• Experience collaborating with distributed teams.

• Ability to articulate technical concepts clearly in both written and verbal communication.

🏝️ Benefits

• Competitive performance-based bonus plans for all eligible employees - we succeed together as one team.

• Generous retirement contributions with 100% immediate vesting (regardless of individual contributions).

• Quarterly company-wide wellness days where everyone takes a break together.

• Country-specific holidays in addition to a day off for your birthday.

• One-time stipend for home office setup.

• Annual budget for professional development.

• Quarterly wellness stipend.

• Significant paid parental leave.

• Employee referral bonus program.

• Additional benefits (life/AD&D, disability, EAP, etc. - varies by country).