Hiroki Nakagawa
Staff Software Engineer at Google
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolHiroki Nakagawa is a Staff Software Engineer based in Tokyo with 11 years of expertise as a core committer to Chromium/Chrome, now leading technical efforts and teams at Google. He specializes in browser internals—prerendering, service workers, web workers, worklets, and cache storage—and has a strong track record improving Web Platform Tests and Chromium WebView prerender features. His open-source contributions to high-profile projects like chromium and web-platform-tests reflect deep protocol and interoperability knowledge that directly impact web standards compliance. A University of Tokyo master's graduate with a background from Keio University, he blends rigorous academic training with pragmatic engineering at scale. Notably, he’s contributed nuanced test coverage and error-handling fixes that enable more robust prerender behavior on Android WebView, a behind-the-scenes improvement felt by millions of users.
11 years of coding experience
11 years of employment as a software developer
University of TokyoBachelor of Engineering, Department of Information and Computer Science, Faculty of Science and Technology, Bachelor of Engineering, Department of Information and Computer Science, Faculty of Science and Technology at Keio University
Github Skills (15)
prerender10
html10
android-webview10
service-worker10
javas10
prerendering10
javascript10
webview10
webworker10
content-security-policy10
web-standards10
android10
java10
test-automation10
testing10
Programming languages (6)
Github contributions (5)
web-platform-tests/wpt
Aug 2017 - Nov 2022
Test suites for Web platform specs — including WHATWG, W3C, and others
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:98 commits, 1 PR, 17 comments in 5 years 4 months
Contributions summary:Hiroki primarily worked on improving the Web Platform Tests (WPT) framework for the testing of various web platform specifications. Their contributions include modifying existing tests for different areas, such as service workers, shared workers, media and web workers. Additionally, they added new tests for features like the No-Vary-Search header, ES modules, and Content Security Policy, demonstrating a focus on expanding and refining the test suite for enhanced web standards compliance. The user also addressed code quality and structure through modernizing tests using ES6 features and code cleanup.
microsoft-edgetest-runnerspecssafarifirefox
chromium/chromium
Dec 2019 - Jan 2023
The official GitHub mirror of the Chromium source
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:22 commits in 3 years 1 month
Contributions summary:Hiroki primarily worked on WebView Prerender, contributing to the implementation of features and tests related to preloading web pages for the Android WebView. Their contributions include fixing error handling, incorporating No-Vary-Search headers, and supporting multiple prerendering attempts. They also wrote and updated test cases to ensure WebView prerendering works correctly, including cases with cancellation signals and with varying prerendering limits.
chromiumgithub-mirrorchrome
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