Kevin Babbitt
Principal Software Engineer at Microsoft
Seattle, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolKevin Babbitt is a Principal Software Engineer at Microsoft with over nine years of formal experience and a long tenure contributing to Chromium and web-platform projects. He specializes in browser style engines, tracing, and CSS color semantics—improving traceability of style invalidations and hardening color handling across rendering, animations, and canvas contexts. His contributions span back-end engine work, front-end test suites, and specification edits for the CSSWG, showing rare fluency across implementation, testing, and standards. Based in Seattle and a Carnegie Mellon computer science graduate, he blends deep systems knowledge with meticulous technical writing and test automation to drive interoperable, debuggable browser features.
9 years of coding experience
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at Carnegie Mellon University
Github Skills (16)
html10
css10
javascript10
c-language10
browser10
cprogramming-language10
web-standards10
documentation10
test-automation10
testing10
cssom9
dom9
web-development9
unit-testing8
canvas8
Programming languages (6)
Github contributions (5)
w3c/csswg-drafts
Aug 2019 - Mar 2025
CSS Working Group Editor Drafts
Role in this project:
Technical Writer
Technical WriterContributions:44 reviews, 12 PRs, 9 pushes in 5 years 8 months
Contributions summary:Kevin primarily contributed to the documentation of the CSS Working Group Editor Drafts. Their commits focused on clarifying existing documentation, fixing typos, correcting markup in examples, and refining definitions within the specifications. They also made changes to ensure the examples accurately represented the intended behavior and addressed bikeshed warnings. The user demonstrated skills in editing and refining specifications, especially those relating to CSS.
cssworking-groupdrafts
web-platform-tests/wpt
Feb 2017 - Oct 2020
Test suites for Web platform specs — including WHATWG, W3C, and others
Role in this project:Front-end Developer
Front-end DeveloperContributions:5 commits, 1 PR, 1 branch in 3 years 8 months
Contributions summary:Kevin primarily focuses on enhancing the web platform's color-related features and ensuring the correct behavior of color properties across different contexts, including animations and canvas elements. Their contributions involve modifying the handling of color keywords, particularly `currentcolor`, in various CSS properties. They have also addressed issues related to the interaction of relative colors with the :visited pseudo-class and the correct parsing of color values within different frameworks and APIs. These changes appear to be aimed at improving the consistency and correctness of CSS color handling and testing.
microsoft-edgetest-runnerspecssafarifirefox
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.