Derek Li
Software Engineer at Meta
Cupertino, California, United States
Summary
👤
Senior🎓
Top SchoolDerek Li is a software engineer based in Cupertino with eight years of experience building full-stack web applications and a particular focus on polished, user-first UX. He has shipped product improvements and performance wins at startups like Atmosfy and CrowdAI—cutting app latency by up to 30%, driving daily retention growth, and scaling annotation pipelines for ML training. Derek also contributes to high-profile open source work on Firefox DevTools, improving the Debugger’s UI and developer ergonomics. Comfortable across React, Rails, testing and performance tooling, he pairs pragmatic engineering (A/B testing, CI, Cypress) with a designer’s attention to detail.
8 years of coding experience
3 years of employment as a software developer
Bachelor of Science (B.S.), Management Economics, Bachelor of Science (B.S.), Management Economics at University of California, Davis
Chinese, Shanghainese
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (11)
uid10
javascript10
front-end-development10
ui-design10
react10
html9
css9
debug8
debugging8
devtools8
developer-tools8
Programming languages (4)
Github contributions (5)
firefox-devtools/debugger
Jan 2019 - May 2019
The faster and smarter Debugger for Firefox DevTools 🔥🦊🛠
Role in this project:
Front-end Developer
Front-end DeveloperContributions:11 commits, 7 PRs, 43 comments in 3 months
Contributions summary:Derek primarily focused on enhancing the user interface and functionality of the Firefox debugger. Their contributions included adding a black box option to the context menu, which affects how sources are handled within the debugger. They also modified the editor and footer components, ensuring the footer is always rendered and adding cursor position details. Furthermore, the user updated the WhyPaused component to improve visibility.
firefoxsmarterfasterdeveloper-toolsdebugging
derek-li/debugger.html
Jan 2019 - May 2019
The Firefox debugger that works anywhere :boom:
Contributions:77 pushes, 9 branches in 3 months
firefoxdebuggeranywhere
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