Frontend Engineer, Screensharing UI (Contract)

Mozilla; United States; Remote; USD 154,000 - 168,000; Part time

Job summary

Mozilla is seeking a front-end engineer on a fixed-term contract to implement UX designs for Firefox's screen, window, and tab sharing, delivering a production-ready UI in a large codebase. You'll collaborate with UX and QA, contribute to mozilla-central through public code reviews on Phabricator, and participate in testing with partners to ensure compatibility with major conferencing services.

Requires 4+ years of frontend experience, strong JS/HTML/CSS skills, and comfort working in an

Qualifications

• 4+ years building production user interfaces with JavaScript, HTML, and CSS.
• Ability to implement approved designs faithfully and flag edge cases.
• Experience in large, mature codebases you didn’t write.
• Experience writing automated tests for user interfaces.
• Strong asynchronous written communication across timezones.
• Comfort working in public with Bugzilla and Phabricator.

Responsibilities

• Implement UX designs for Firefox screen, window and tab sharing.
• Build browser UI that is accessible, tested, and localizable.
• Collaborate with UX and QA to validate results.
• Support partner testing with major web conferencing services.
• Land changes in mozilla-central via public code review.

Skills

UI development

JavaScript

HTML/CSS

Automated UI tests

Async written communication

Tools

Phabricator

Bugzilla

Mochitest

WebRTC

Fluent localization

Job description

Mozilla is seeking a front-end engineer on a fixed-term contract to implement UX designs for Firefox's screen, window, and tab sharing, delivering a production-ready UI in a large codebase. You'll collaborate with UX and QA, contribute to mozilla-central through public code reviews on Phabricator, and participate in testing with partners to ensure compatibility with major conferencing services.

Requires 4+ years of frontend experience, strong JS/HTML/CSS skills, and comfort working in an