Edgar Chen
Staff Software Engineer at Mozilla
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolEdgar Chen is a Staff Software Engineer based in Berlin with 13 years of experience building front-end and system-level features, primarily at Mozilla where he has driven Custom Elements implementation, telephony APIs, and emulator infrastructure. He combines deep JavaScript and HTML expertise with low-level telephony and networking experience from earlier roles at HTC, giving him a rare full-stack perspective across browser internals, mobile systems, and platform tests. An active open-source contributor, Edgar has improved clipboard behavior and expanded test coverage in high-profile projects like Mozilla’s gecko-dev and the web-platform-tests suite. He owns product-facing modules (RIL, emulator) and is known for refactoring legacy code into more robust, testable APIs. Colleagues rely on him to bridge spec-driven web platform work with pragmatic engineering and automated testing.
13 years of coding experience
8 years of employment as a software developer
Bachelor of Science (B.S.), Computer Science and Engineering, Bachelor of Science (B.S.), Computer Science and Engineering at Yuan Ze UniversityMaster of Science (M.S.), Embedded system and networking, Master of Science (M.S.), Embedded system and networking at National Taiwan University of Science and Technology
Github Skills (10)
html10
custom-element10
javascript10
firefox10
mobile-development10
web-standards10
test-automation10
testing10
dom9
css6
Programming languages (10)
Github contributions (5)
mozilla/gecko-dev
Dec 2012 - Jan 2023
Read-only Git mirror of the Mercurial gecko repositories at https://hg.mozilla.org. How to contribute: https://firefox-source-docs.mozilla.org/contributing/contribution_quickref.html
Role in this project:
Front-end Developer
Front-end DeveloperContributions:975 commits in 10 years 2 months
Contributions summary:Edgar's contributions primarily involve modifying JavaScript and related files within the widget and test directories, as well as adding and modifying HTML files. They focused on improving clipboard functionality within the Gecko browser engine, specifically by renaming and modifying APIs and testing their integration. The code changes include refactoring tests, fixing bugs, and improving test coverage across different clipboard types and behaviors.
repositoriesfirefoxmercurialgit-mirrormozilla
web-platform-tests/wpt
May 2016 - Jan 2023
Test suites for Web platform specs — including WHATWG, W3C, and others
Role in this project:Front-end Developer & Test Automation Engineer
Front-end Developer & Test Automation EngineerContributions:1 review, 88 commits, 15 PRs in 6 years 9 months
Contributions summary:Edgar primarily contributed to the test suite for the web platform tests repository, focusing on custom elements. Their contributions included adding new tests, fixing existing tests, and improving the robustness of the tests. They demonstrated expertise in custom elements, HTML, and JavaScript, modifying existing test files to align with specifications and incorporating test-driven development practices.
microsoft-edgetest-runnerspecssafarifirefox
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