Kukuh Sulistyo is a Frontend Engineer with nine years of software experience and a five-year focus on building responsive, accessible web applications and design systems. He has led migrations and architecture changes—most notably moving Ruangguru’s classroom platform from React+ReasonML to Next.js+TypeScript—while mentoring junior engineers to own complex frontend tasks. At INA Digital Edu he implemented a national assessment frontend used by over 1.3 million teachers and drove accessibility adoption to meet WCAG standards, improving inclusivity at scale. Kukuh contributes to major open-source projects like MUI (Material-UI), where he improved core components and practical UI behaviors such as text-overflow handling in Chip and TextField refinements. He combines pragmatic engineering with a designer’s attention to UI details and a track record of increasing user engagement through thoughtful frontend work. Based in South Tangerang, Indonesia, he pairs production experience with a habit of spreading accessibility knowledge via code reviews and team sessions.
9 years of coding experience
3 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Telkom University
Computer Software Engineering, Computer Software Engineering at SMK Telkom Sandhy Putra Purwokerto
Material UI: Comprehensive React component library that implements Google's Material Design. Free forever.
Role in this project:
Front-end Developer
Contributions:5 commits, 7 PRs, 13 comments in 10 months
Contributions summary:Kukuh primarily contributed to the Material UI React component library, focusing on improving existing components and addressing specific issues. Their contributions included enhancing the `Chip` component with `text-overflow: ellipsis`, refining the `TextField` component (e.g., reducing helper text height and passing minRows to the `InputComponent`), and dropping a workaround related to IE11 rendering. They also modified core components by changing the children to be optional.
A forked version of Sendbird UI Kit. Modified to match Ruangguru's requirements
Contributions:9 releases, 66 reviews, 75 PRs in 7 months
modifiedsendbirdui-kitmatch
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Kukuh Sulistyo - Frontend Engineer at INA Digital Edu