Senior Software Engineer, WebExtensions

📋 Description

• Implement and maintain WebExtensions APIs and Addon Management, ensuring a balance between power, safety, and performance, along with user interfaces in Firefox.

• Troubleshoot and resolve issues impacting extensions within Firefox.

• Work collaboratively with product managers, QA, and the AMO engineering team to deliver features from conception to completion.

• Contribute to extensions and system add-ons owned by Mozilla.

• Engage in open source practices: code reviews, pull requests, and discussions in Bugzilla/GitHub.

• Assist extension developers by diagnosing issues and enhancing tooling/documentation.

⛳️ Requirements

• 4+ years of professional experience in software development.

• Strong expertise in JavaScript, DOM APIs, HTML, and CSS.

• Familiarity with modern browser architecture and debugging tools.

• Experience in API design and integration.

• Ability to navigate and learn from extensive codebases.

• Excellent communication skills and experience working in distributed teams.

• Bonus points for:

• Experience with Firefox internals, C++ or Rust.

• Knowledge of Android or GeckoView development.

• Understanding of web security principles.

• Contributions to open source projects, particularly in browser or extension development.

🏝️ Benefits

• Generous performance-based bonus plans available to all eligible employees - we celebrate our collective success as one team.

• Comprehensive medical, dental, and vision coverage.

• Significant retirement contributions with 100% immediate vesting (regardless of your contributions).

• Quarterly wellness days for the entire company, allowing everyone to take a collective break.

• 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 stipend for well-being.

• Generous paid parental leave.

• Employee referral bonus program.

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