Join Mozilla as a Front End Engineer to revolutionize Firefox’s screen and tab sharing features. Collaborate closely with UX teams to implement approved designs and ensure a seamless user experience.

This contract role demands a skilled engineer with over four years in production UI development using JavaScript, HTML, and CSS. You will contribute to Firefox’s large codebase, addressing unforeseen design challenges while working with QA and supporting partner testing of web conferencing services. Your experience with automated testing and open-source contributions will be paramount in landing your work in mozilla-central through public code reviews.

Key Responsibilities:
• Implement approved UX designs for Firefox features
• Build accessible and localizable browser UI




• Collaborate with QA for design validation
• Support testing against various web conferencing services
• Contribute to public code reviews on Phabricator

Requirements:
• 4+ years in production user interface development
• Experience with JavaScript, HTML, and CSS
• Familiarity with Firefox front-end architecture
• Knowledge of WebRTC and accessibility standards
• Asynchronous written communication skills

Lead the development of UI features for Firefox while ensuring a robust user experience across various platforms.
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📌 Front End Engineer for Firefox (Quebec City)
🏢 Mozilla
📍 Quebec City