Kazunari Hara
Engineering Lead, Ameba Management Board at CyberAgent, Inc.
Greater Tokyo Area Japan
Summary
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SeniorKazunari Hara is an engineering lead at CyberAgent with 18 years of web development experience, specializing in performance, accessibility, and design systems. He leads Spindle, Ameba’s award-winning design system (Good Design Award 2023), and has driven a 3x faster prototyping workflow by integrating Figma Dev Mode and Web MCP. As a long-term Google Chrome partner he built real-world demos for View Transitions, on-device AI, and Web MCP featured on Chrome for Developers, and improved Ameba Manga’s CLS by 10x, helping triple reader growth. A published author and frequent speaker, he distills complex front-end problems into practical guidance through books and conference talks across Japan. Less obvious: he pairs product-minded engineering with hands-on experimentation (including a WebAssembly voice-blog project) to bridge design and engineering for scalable, accessible user experiences.
11 years of coding experience
Github Skills (59)
accessibility10
typescript10
palette10
wcag10
react10
color-palette10
postcss9
css9
preset9
deprecated9
rule8
amp-html8
textlint8
javascript8
css-filters8
Programming languages (5)
Github contributions (5)
openameba/spindle
Jul 2020 - Jan 2023
Ameba Design System
Contributions:737 reviews, 840 commits, 837 PRs in 2 years 6 months
reacttypescriptamebadesign-system
herablog/spindle
Nov 2020 - Jan 2023
Contributions:1 PR, 14 pushes, 3 branches in 2 years 2 months
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