Simurai - Product Designer at GitHub

Simurai

Product Designer at GitHub

Sapporo, Japan

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Summary

🤩

Rockstar

🎓

Top School

Simurai is a Product Designer and seasoned front-end specialist with 15 years crafting polished, accessible UIs—from editor themes to documentation sites—now shaping product at GitHub from Sapporo. He combines pixel-level CSS mastery with practical UI engineering, having contributed notable improvements to high-profile projects like Atom, Primer, and Electron where his work fixed layout, theming, and responsive issues across many core repos. Comfortable both designing and shipping code, he routinely refactors styles, implements responsive patterns, and converts visual ideas into robust components. Known for playful attention to detail (“CSS doodler” and “vibe styler”), he brings designer sensibilities to developer tools, improving usability for other engineers. An early web-publishing certificate and a background across agencies and product teams give him a pragmatic eye for documentation, theming, and developer UX.

15 years of coding experience

3 years of employment as a software developer

Certificate, Web Publishing, Certificate, Web Publishing at CCT Vancouver

English, German

Github Skills (46)

atom-editor10

customizer10

editors10

ruby-rails10

javascript10

montage10

custom-theme10

electron10

ui-components10

css10

autocomplete10

responsive-design10

rails10

user-interface10

carbon-design-system10

Programming languages (16)

MDXC#CSSC++RustHandlebarsHTMLJupyter Notebook

Github contributions (5)

atom/one-dark-ui

Apr 2015 - Aug 2018

Atom One dark UI theme

Role in this project:

Front-end Developer

Contributions:7 releases, 312 commits, 173 PRs in 3 years 5 months

Contributions summary:Simurai primarily contributed to the UI design and styling of the Atom One Dark UI theme. Their work focused on adjusting tab sizing, positioning, and appearance, including the close icon and the active pane marker. They implemented visual improvements like background highlights and adjustments for different screen sizes, including the addition of a compact mode and font-size adjustments. Furthermore, they made adjustments to address styling issues within specific packages.

atom-oneatom-one-darkdark-themedark-modedark-ui-theme

atom/one-dark-syntax

Oct 2014 - May 2018

Atom One dark syntax theme

Role in this project:

UI Designer

Contributions:2 releases, 197 commits, 58 PRs in 3 years 8 months

Contributions summary:Simurai primarily focused on styling and theming the Atom One Dark syntax theme. Their contributions included importing UI variables, adjusting color schemes, and modifying gutter, cursor, and selection styles. They also addressed specific issues such as styling find markers and fixing deprecated selectors, improving the visual appearance of the code editor. Additionally, the user introduced support for duotone syntax highlighting and Markdown support.

atom-oneatom-one-darksyntax-themedark-syntax-themedark-theme

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