Frontend Developer (React · TypeScript)
Focused on scalable architecture and measurable performance improvements.

I’m a frontend developer specialising in React and TypeScript, building scalable and performant web applications.

Rather than simply delivering features, I focus on measurable performance improvements, server-state optimisation and clean component architecture. I design applications with long-term maintainability, rendering efficiency and product scalability in mind.

Currently targeting mid-level frontend opportunities in Sydney.

• React 18/19
• TypeScript
• Next.js
• TanStack Query
• Zustand
• Tailwind CSS

• REST API Integration
• Server-State Caching
• Query Optimisation
• Rendering Optimisation
• Component Reusability

• Git / GitHub (Feature Branching + PR Reviews)
• Vite
• ESLint / Prettier
• Agile Collaboration

React · TypeScript · TanStack Query · Supabase · Vite

• Designed and deployed a production-ready movie discovery application.
• Reduced unnecessary API requests by approximately 65–70% by implementing debounce logic and optimising query key structure (measured via Chrome DevTools Network panel).
• Improved Lighthouse performance score from 74 to 92 by optimising image loading and reducing render-blocking resources.
• Reduced bundle size by ~22% through dependency cleanup and modularised imports (measured via Vite build output comparison).
• Refactored component architecture into reusable and isolated modules to improve maintainability.
• Implemented server-state caching and controlled query invalidation using TanStack Query.
• Built authentication and protected routes using Supabase with persistent session handling.

🔗 Live: https://popcorn-play.sowonkim.com/
🔗 Repo: https://github.com/SowonHub/pop-corn-play

User preference-based game recommendation & community platform
React · TypeScript · Next.js · Zustand · TanStack Query

• Led implementation of the My Page flow (profile, dashboard, wishlist and review management) using reusable and modular UI components.
• Reduced unnecessary refetching by restructuring query keys and introducing controlled query invalidation, decreasing repeated API calls by approximately 40% (measured via DevTools Network panel).
• Improved list rendering performance by separating global and local state (Zustand + component state), reducing unnecessary re-renders during filter/sort interactions.
• Implemented scalable filtering, sorting and pagination logic to support smooth navigation in large list views.
• Refactored component and folder architecture (UI / hooks / API / constants separation) to improve maintainability and reduce coupling.
• Collaborated in Agile sprint cycles using structured Git branching strategy and PR reviews, ensuring code quality and consistent delivery.

🔗 Repo: https://github.com/SowonHub/oz-union-fe-14-team1

I aim to contribute to product-driven teams where performance, clean architecture and user experience matter.

Always building. Always refining.