Contract Staff Front End Engineer (Web Conference/Screen Sharing)

Remote · 4+ years experience · Remote · Posted Sep 22, 2026

At a glance

Mozilla's Web Conferencing team is seeking a fixed-term contract front-end engineer to implement and ship a set of screensharing improvements for Firefox.
The role involves building browser UI for screen, window, and tab capture features that integrate with services like Google Meet, Zoom, and Jitsi.

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

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

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