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Contract Staff Front End Engineer (Web Conference/Screen Sharing) at Mozilla. . Location: Remote Canada. About the team and role. .  . . Mozilla's Web Conferencing team owns the media capture and sharing features that make Firefox work for video calls: screen, window, and tab capture, and the interface users interact with when they share content in Google Meet, Zoom, or Jitsi.. .  . . We're bringing a set of screensharing improvements to Firefox. The backend work is complete and the UX has been designed and approved. We're looking for a front-end engineer on a fixed-term contract to implement it and ship it.. . What you'll do. . . Implement approved UX designs for Firefox's screen, window, and tab sharing experience, and see them through to release. . Build browser UI that holds up in a large, widely used codebase: tested, accessible, and localizable. . Work with UX on the cases a design didn't anticipate, and with QA on validating the result. . Support partner testing against major web conferencing services. . Land your work in mozilla-central through public code review on Phabricator. . . What you'll bring. . . 4+ years building production user interfaces with JavaScript, HTML, and CSS. . Experience implementing an approved design faithfully, plus the judgment to flag it when the design meets a case it didn't anticipate. . Ability to get productive quickly in a large, mature codebase you didn't write. . Experience writing automated tests for user interfaces. . Strong asynchronous written communication, since the team is distributed across timezones. . Comfort working in public, since Bugzilla and Phabricator are open. . . Bonus qualifications. . . Prior contributions to Firefox or another open-source browser. . Familiarity with Firefox front-end architecture: . browser/. , custom elements, XUL, Fluent localization. . Experience with WebRTC or . getDisplayMedia. . Accessibility experience with modal dialogs and list navigation. . Experience with Mozilla's test frameworks (browser-chrome, mochitest). . Experience using AI tooling effectively in front-end development. . Open source environment experience. . Hiring Ranges:. Canada Tier 1 Locations. $145,000. - . $170,800. . CAD. Canada Tier 2 Locations. $154,000. - . $168,000. . USD