CHA HYUNWOO
Full-Stack Developer
Seoul, Korea
BRIEF INTRODUCTION
I am a developer who is flexible and easy to adapt to any situation.
I like to write code that increases productivity.
I try to write code that takes 10 minutes today, but takes 5 minutes tomorrow.I am a developer who is flexible and easy to adapt to any situation. I like to write code that increases productivity.I try to write code that takes 10 minutes today, but takes 5 minutes tomorrow.
SKILLS
BaaS
SupabaseFirebase
Backend
Node.jsNestJSPythonJava / Kotlin
Build & DevOps
TurborepoViteDockerGitHub ActionsJenkinsAWSCloudflareBiome
Database & ORM
PostgreSQLMySQLMongoDBPrisma
Design System
shadcn/uiStorybookRadix UI
Frontend
HTML / CSSJavaScriptTypeScriptReactNext.jsVue.jsTailwind CSSSass / SCSS
Mobile
React Native
Routing & Data
TanStack RouterTanStack Table
State Management
TanStack QueryZustandReduxRecoil
Tools & Collaboration
GitFigmaJiraCursor
EDUCATION
Soongsil University
Bachelor of Accounting, Computer Science Minor
ACBS
Bachelor of Computer Science
PERSONAL PROJECTS
GitHub Tier
Open-source widget that generates LoL-style tier rank cards based on GitHub activity.
HonoTypeScriptVercel Edge FunctionsGitHub API
Discord Multi-Bot
Multi-feature Discord bot with train booking assistance and real-time gas price alerts.
Pythondiscord.pyDockerAWSGitHub Actions
hyunwoo.dev
Personal tech blog built with Next.js 16. MDX content, Cmd+K search, SEO optimized.
Next.jsTypeScriptTailwind CSSMDXVercelReact.jsTurborepo
EXPERIENCE
Freelance Full-Stack Developer
2025 - PresentFull-Stack Developer / Freelancer
- Financial back-office system design and frontend tech leading (React 19 + TanStack)
- Feature-First Architecture based domain-centric modular structure design
- Large-scale data processing system with TanStack Router/Query/Table/Virtual
- SSE-based real-time data streaming and JWT + 2FA authentication system
- Next.js service guide UI development
- Enterprise design system and shared component design/development
Large-Scale IoT Service webOS TV App Development
2024 - 2025FE Developer / PL
- Led frontend development from webOS TV app architecture design to production release
- Redux ecosystem (redux-thunk, redux-saga) based state management architecture design
- Jenkins CI/CD pipeline and automated build/deployment process optimization
- Multi-language support (US, Germany, Russia, UK) system and i18n integration
- WCAG 2.1 accessibility compliance and performance optimization (30% loading time reduction)
- webOS luna API analysis and optimized TV hardware resource integration
Large-Scale IoT Service Shared Component Development
2023 - 2023FE Developer
- React cross-platform webview architecture design and performance optimization (40% loading speed improvement)
- Enterprise component library development with Storybook interactive documentation
- D3.js real-time data visualization dashboard development
- iOS/Android platform browser engine analysis and adaptive rendering implementation
- PropTypes + TypeScript type safety improvements reducing runtime errors by 85%
- FUT (Functional Under Test) environment for component test automation
Recruitment Platform Frontend Development
2021 - 2022FE Developer
- Core frontend feature design and development for recruitment platform with Vue.js and React
- Contributed to service scaling and stabilization during rapid growth as an early startup member
- Responsive web UI/UX design and user experience optimization
- REST API integration and client state management architecture design
- Reusable component library design and development
- Performance bottleneck analysis and rendering optimization for growing user traffic
Web3 & Blockchain-Based Financial Service Development
2021 - 2021Full-Stack Developer
- Banking mobile app UI development and user interface management
- NFT-based authentication system development (OpenSea integration, digital wallet)
- Decentralized web service development utilizing Web3 technology
- MetaMask and digital wallet login system development
- NFT minting/trading interface design and smart contract integration
- Blockchain-based user authentication flow design and implementation
Financial Service Full-Stack Development
2017 - 2020Full-Stack Developer
- Financial service backend system design and development with Java Spring
- DB schema design and query optimization for financial data processing
- High-volume financial transaction processing system stability assurance
- Full-stack web service development (frontend + backend)
- REST API design and external financial API integration
- Authentication/authorization system for financial security regulation compliance