Kukhyeon Heo
Open Source Developer at Self-employed
Incheon, South Korea
Summary
🤩
Rockstar🎓
Top SchoolKukhyeon Heo is an experienced open source developer with 11 years of hands-on experience improving developer tooling and front-end platforms. He has solved 100+ issues across major projects like Cypress, WordPress Gutenberg, Recharts and Ghost, often tackling root-cause debugging that requires tracing into compiled node_modules and legacy code. A TypeScript and React enthusiast, he has driven migrations, refactors and test-first fixes—e.g., converting CoffeeScript to modern JS, adding TypeScript to Recharts, and stabilizing flaky tests in Cypress and Gutenberg. He balances pragmatic code changes with thorough test coverage and thoughtful review conversations, preferring evidence-based compromises over blind acceptance. Based in Incheon, South Korea, he pairs community-minded contributions with real product impact, from YAML-based redirects in Ghost to ESLint and Babel fixes in Gutenberg. Outside code he describes himself as a Christian and a “Machine Tamer,” signaling a curious, service-oriented approach to engineering.
11 years of coding experience
4 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Incheon National University
Github Skills (39)
babel610
javascript10
cypress10
ui-components10
testing10
wordpress10
typescript10
test-framework10
emberjs10
component-kit10
chai10
gutenberg10
typescript-types10
babel-core10
babeljs10
Programming languages (13)
Github contributions (5)
cypress-io/cypress
Oct 2019 - Dec 2022
Fast, easy and reliable testing for anything that runs in a browser.
Role in this project:
Front-end Developer & Test Automation Engineer
Front-end Developer & Test Automation EngineerContributions:270 reviews, 296 commits, 239 PRs in 3 years 2 months
Contributions summary:Kukhyeon's primary focus appears to be on improving the testing framework for the Cypress project, with a strong emphasis on enhancing the reliability and functionality of end-to-end testing. They addressed flaky tests by refactoring and modifying code within existing test files, specifically concerning browser re-runs and test state. Additionally, the user implemented significant code refactoring to modernize parts of the codebase, converting CoffeeScript files to JavaScript. They also fixed existing linting errors and adapted assertions, showcasing knowledge of the project's testing framework.
waittest-runnertesting-toolse2e-testsend-to-end-testing
recharts/recharts
Oct 2019 - Oct 2019
Redefined chart library built with React and D3
Role in this project:Front-end Developer
Front-end DeveloperContributions:98 commits, 11 PRs, 24 comments in 15 days
Contributions summary:Kukhyeon primarily focused on refactoring and improving the codebase of the Recharts library. Their work involved removing `pureRender` from multiple components, indicating an effort to optimize rendering performance. Additionally, the user addressed long lines and disabled the `index-array-key` rule. They also updated the codebase to TypeScript.
chartsreactbuilt-with-reactcharting-librarychart
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.