Changseok Oh
Sr. Software Engineer at GNOME Foundation
San Francisco Bay Area United States
Summary
👤
Senior🎓
Top SchoolChangseok Oh is a senior software engineer and security researcher with 14 years of experience at the intersection of web platforms, browser security, and systems-level engineering. A long-time open-source committer to WebKit and contributor to Chromium, GNOME, and the widely used web-platform-tests suite, he brings deep expertise in CSS, text rendering and cross-platform behavior that informs robust browser and web compatibility work. Based in the San Francisco Bay Area, he blends industry roles—including senior engineering at TikTok—and academic research from Georgia Tech (MS in CS and Cybersecurity) to tackle emerging web and privacy challenges. His background spans both product-focused engineering at companies like Samsung and Collabora and research-driven contributions that uncover subtle platform-specific issues. Colleagues value him for shipping practical test coverage and security hardening that prevent real-world regressions across major browser engines.
14 years of coding experience
14 years of employment as a software developer
Master of Science - MS, Computer Science, Master of Science - MS, Computer Science at Georgia Institute of TechnologyBachelor’s Degree, Digital Media, Bachelor’s Degree, Digital Media at Ajou University
Stackoverflow
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Github Skills (8)
css10
web-development10
test-automation10
testing10
browser9
html9
test-runner8
javascript4
Programming languages (7)
Github contributions (5)
web-platform-tests/wpt
Apr 2023 - Oct 2023
Test suites for Web platform specs — including WHATWG, W3C, and others
Role in this project:
Front-end Developer
Front-end DeveloperContributions:4 reviews, 3 PRs, 11 comments in 7 months
Contributions summary:Changseok primarily contributed to the test suites for the Web platform specs, specifically focusing on CSS fonts and text-decoration properties. They implemented and updated tests related to the `font-size-adjust` property, including the handling of the `from-font` value, and the behavior of this property with fallback fonts. Their work involved creating new test files and modifying existing ones to cover valid and invalid cases, as well as refining tests for animation support and ensuring correct rendering across different platforms. The user also addressed an issue with system fallback fonts and made adjustments to existing tests to accommodate platform-specific rendering behaviors.
microsoft-edgetest-runnerspecssafarifirefox
shivamidow/shivamidow.github.io
Jul 2017 - Aug 2024
Contributions:149 pushes, 3 branches in 7 years 2 months
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