Hiroki Kokubun
Founder at flufflop
Japan
Summary
🤩
RockstarHiroki Kokubun is a founder and seasoned developer-designer based in Japan with 14 years of experience crafting polished front-end experiences. He combines product-minded engineering with visual sensibility, contributing UI-focused improvements to popular open-source projects like Tweakpane and aesthetic tooling such as the Iceberg Vim color scheme. His work shows attention to detail—optimizing component layouts, custom number formatting, color object handling, and pointer-interaction bug fixes—to make developer-facing tools both efficient and delightful. As a co-founder at Flufflop, he bridges design and code, shipping features that improve usability for other builders. Colleagues describe him as someone who notices and removes unnecessary complexity, often improving UX through subtle but impactful refinements.
14 years of coding experience
Github Skills (10)
html10
vim10
neovim10
css10
uid10
javascript10
front-end-development10
ui-design10
syntax-highlighting10
color-scheme10
Programming languages (7)
Github contributions (5)
cocopon/iceberg.vim
Jan 2014 - Nov 2022
:antarctica: Bluish color scheme for Vim and Neovim
Role in this project:
Front-end Developer
Front-end DeveloperContributions:3 reviews, 202 commits, 45 PRs in 9 years
Contributions summary:Hiroki's contributions centered around modifying the CSS color scheme file, 'iceberg.vim,' which is a color scheme for Vim and Neovim. Their commits involved adding and linking various highlighting groups, especially those related to JavaScript and CSS, to provide syntax highlighting for HTML, Javascript, and other languages used in web development. They also adjusted the colors of various text elements to improve the overall aesthetic and balance of the color scheme, and adding support for additional plugins.
schemevimvim-colorschemelightlinemonochrome
cocopon/tweakpane
Mar 2016 - Jan 2023
:control_knobs: Compact GUI for fine-tuning parameters and monitoring value changes
Role in this project:Front-end Developer
Front-end DeveloperContributions:72 releases, 3 reviews, 1418 commits in 6 years 11 months
Contributions summary:Hiroki focused on optimizing the UI components of the Tweakpane library. Their contributions included removing unused code to optimize the display of various UI elements such as the SV and hue palette inputs, and implementing features like color object handling, a custom number formatter, and improved layout for tabbed controls. Additionally, the user was responsible for addressing bug issues related to pointer interaction.
parameterspythoncompactknobsgui
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