Andy Jaime
Software Engineer at birchill
Tokyo, United States
Summary
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RockstarAndy Jaime is a software engineer with 17 years of experience, based in Tokyo, who blends deep browser internals expertise with practical language tooling work. A former Firefox engineer, he has contributed to high-profile open-source projects like Servo and Web Platform Tests, focusing on CSS parsing, styling, and rendering correctness. As an invited expert to the CSS Working Group for Animations, he shapes spec-level behavior as well as implements robust editor and SVG features across Lexical, bikeshed, and SVGWG. His work spans backend engine bindings to front-end rich-text and animation semantics, showing a rare full-stack fluency in web platform engineering. Now building Japanese and language tooling at Birchill, he brings browser-grade precision to developer-facing localization and language tools. Colleagues rely on him for subtle cross-spec interoperability fixes and rigorous test suites that prevent regressions in complex rendering scenarios.
17 years of coding experience
Stackoverflow
829reputation
28kreached
27answers
2questions
Github Skills (28)
webbrowser10
css-transitions10
javascript10
servo10
python10
testing10
css10
browser10
webengine10
web-animations-api10
svg10
front-end-development10
css-animations10
web-standards10
parse10
Programming languages (15)
Github contributions (5)
w3c/svgwg
May 2012 - Jun 2021
SVG Working Group specifications
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:75 commits, 3 PRs, 35 pushes in 9 years 2 months
Contributions summary:Andy primarily contributed to the SVG Working Group specifications, with a focus on enhancing the animation and masking features of SVG. They added new attributes and properties, like `maskType`, to the `mask` element, and updated the codebase to deprecate `xlink:href` in favor of `href`. Further contributions involved updates to documentation, interface definitions, and example files to reflect these changes. Additionally, this user helped integrate changes from the CSS Masking spec, improving the overall functionality and usability of SVG.
svgrsvgosvgwavemorph
web-platform-tests/wpt
Apr 2014 - Nov 2022
Test suites for Web platform specs — including WHATWG, W3C, and others
Role in this project:Front-end Developer
Front-end DeveloperContributions:5 reviews, 256 commits, 66 PRs in 8 years 8 months
Contributions summary:Andy primarily contributed to the CSS Transitions tests, focused on ensuring correct behavior and event dispatch. Their work involved modifying existing tests and adding new ones to cover different scenarios, including transitions with ::marker pseudo-elements and changes to transition properties. They addressed various aspects of the testing suite, including updating existing tests, improving test readability, and handling elements that are not being rendered during style updates.
microsoft-edgetest-runnerspecssafarifirefox
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