Senior Software Engineer, WebExtensions

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

📋 Description

• Develop and uphold WebExtensions APIs and Addon Management, ensuring a balance of power, safety, performance, and user interfaces in Firefox.

• Troubleshoot and resolve issues impacting extensions within the Firefox ecosystem.

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

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

• Engage in open-source workflows, including code reviews, pull requests, and discussions within Bugzilla/GitHub.

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

⛳️ Requirements

• Over 4 years of professional experience in software development.

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

• Familiarity with contemporary browser architecture and debugging tools.

• Experience in API design and integration.

• Ability to effectively navigate and learn from extensive codebases.

• Excellent communication skills and experience working in distributed teams.

• Bonus points for:

• Knowledge of Firefox internals, C++, or Rust.

• Familiarity with 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, allowing us to share in our collective success.

• Comprehensive medical, dental, and vision coverage.

• Significant retirement contributions with 100% immediate vesting, regardless of personal contributions.

• Quarterly all-company wellness days for everyone to take a collective pause.

• 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.

• Substantial paid parental leave.

• Employee referral bonus program.

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