Hyo Jeong is a software engineer with 12 years of experience building full-stack and back-end systems, currently at Meta after roles ranging from front-end engineer to engineering manager. He is a seasoned contributor to the GraphQL ecosystem—notably to GraphiQL and graphql-js—where his work spans UI improvements, documentation, and core library enhancements that improve schema handling and tooling. Comfortable shipping production-grade features and fixing subtle edge cases, he has tackled everything from glob matching and linting infinite loops to language-service integrations in IDEs. With an academic background from Georgia Tech and Carnegie Mellon, Hyo blends rigorous engineering fundamentals with practical product-focused development and a knack for improving developer tooling.
12 years of coding experience
12 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Georgia Institute of Technology
Masters in Software Engineering, Masters in Software Engineering at Carnegie Mellon University
GraphiQL & the GraphQL LSP Reference Ecosystem for building browser & IDE tools.
Role in this project:
Full-stack Developer
Contributions:4 releases, 346 commits, 156 PRs in 2 years 4 months
Contributions summary:Hyo primarily contributed to the UI and documentation aspects of the GraphiQL project. They fixed an infinite loop issue in JSON linting, added features for exploring GraphQL types within the DocExplorer component, and refactored and improved the component's styling. Their contributions also included creating and expanding the documentation explorer, and adding a persistent search box to different editor components.
One configuration for all your GraphQL tools (supported by most tools, editors & IDEs)
Role in this project:
Back-end Developer
Contributions:16 commits, 14 PRs, 6 pushes in 2 months
Contributions summary:Hyo primarily contributed to the codebase by fixing bugs and improving the glob matching logic within the GraphQL configuration tool. They addressed edge cases related to file path handling, including scenarios with full file paths and empty glob patterns. These changes also involved adjusting and fixing flow errors within the extension components. Their work focused on refining core utility functions related to file inclusion and exclusion based on glob patterns.
urqlrelaygraphql-toolssupportedgraphiql
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