Yoav Weiss
Principal Engineer at Shopify
Saint-Donat-sur-l’Herbasse, Auvergne-Rhône-Alpes, France
Summary
🤩
Rockstar🎓
Top SchoolYoav Weiss is a Principal Engineer with 14+ years of experience driving browser and web-platform performance, currently applying that expertise at Shopify after leading key efforts in Chromium and Chrome at Google. He combines deep knowledge of rendering engine internals with standards leadership—co-chairing WICG/Web Performance groups and contributing to WebKit and the Fetch spec—so he routinely ships what others call “impossible” in browsers. His open-source work includes significant test-suite and spec contributions to the widely used web-platform-tests and WHATWG Fetch projects, improving fetch destination behavior and media/resource coverage. A seasoned technical leader and speaker, he excels at untangling large codebases, building cross-platform proxies/clients, and coordinating distributed teams across time zones. An unusual strength is his dual focus on both low-level engine internals and practical test automation, which helps bridge specification, implementation, and real-world reliability.
14 years of coding experience
24 years of employment as a software developer
Bachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at The Open University of Israel
Stackoverflow
2,240reputation
189kreached
26answers
11questions
css
top-5%
background-image
top-5%
html
top-5%
responsive-design
top-5%
Github Skills (23)
javascript10
api-design10
testing10
standard-js10
standardized10
web-standards10
fetch10
background-image9
css9
responsive-design9
html9
test-automation8
dom8
browser8
test-runner8
Programming languages (22)
Github contributions (5)
whatwg/fetch
Feb 2016 - May 2021
Fetch Standard
Role in this project:
Back-end Developer
Back-end DeveloperContributions:82 reviews, 6 commits, 18 PRs in 5 years 3 months
Contributions summary:Yoav primarily focused on modifying the `fetch.bs` file, a key component of the Fetch Standard. Their contributions involved refactoring and extending the standard by introducing new concepts, such as "potential destination" and "prefetch" initiators. The user also updated the standard by adding additional states and types related to response handling and request properties. These changes suggest a focus on defining and refining the core functionalities of the Fetch API, a crucial area for web browser implementations and web application development.
fetchwhatwg
web-platform-tests/wpt
Sep 2014 - Sep 2020
Test suites for Web platform specs — including WHATWG, W3C, and others
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:145 reviews, 75 commits, 82 PRs in 6 years
Contributions summary:Yoav primarily focused on enhancing the test suite for the web platform tests. Their contributions involved adding new tests to verify the correct behavior of various web features, particularly focusing on fetch destination, ensuring resources like images, scripts, and styles are fetched with the appropriate destinations. They also refactored tests using promise-based approaches and added tests for video and audio. Moreover, the user added tests for resources without load events, and performed refactoring to improve the quality and coverage of the test suite.
microsoft-edgetest-runnerspecssafarifirefox
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