Frontend-focused developer specializing in React, TypeScript, and component-driven architecture.
I build reusable UI/UX systems, rapid prototypes, and modern web/mobile applications.
- React, TypeScript, JavaScript
- Component-driven UI architecture
- CSS Modules, SCSS, Tailwind, Emotion, Styled Components
- Storybook-based design system
- Jest / React Testing Library
- Node.js (API, utility services)
- PHP7 (legacy service maintenance experience)
- AWS (Lambda, S3, CloudFront, EC2)
- Web3 (wallet integration & simple contract interaction)
- GitHub Actions (CI/CD automation)
- PWA development & offline-first architecture
- Hybrid App / WebView distribution
- State management with Jotai(Recoil) / Redux-Saga
A lightweight, production-grade PWA for short-term notes and schedule management.
Key work includes:
- Recoil-based state synchronization optimization
- PWA service worker refinement
- UI component structure refactoring for better reuse
- Preparing installable packages for mobile platforms
A general-purpose utility library designed for real production workflows.
- Identifier-based async call merging / queue flushing
- API request deduplication and performance optimization
- Strong TypeScript typing for predictable behavior
A modular design system built with React + TypeScript + Storybook.
- Hundreds of reusable UI/UX patterns
- Planning migration from Emotion to CSS Modules for scalability
- Supports rapid prototyping for web apps & hybrid apps
- Establishing naming conventions and atomic component rules
(Hidden HTML/CSS)
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Rebuilding and stabilizing the internal design system
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Improving PWA & Hybrid App production pipelines
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Prototyping tools for small and personal launch-ready apps
- GitHub Page: https://yoonjonglyu.github.io
- Email:
- Medium: https://medium.com/@yunjongRyu
- Tistory: https://isa-dev.tistory.com
