Naver Financial - Corporate Employee Welfare Platform (Frontend Lead)

• Led the design and implementation of a SPA architecture using React Router Data APIs.
• Designed end-to-end authentication and error-handling flows between the BFF and frontend, including a custom error class–based domain exception framework.
• Established an asynchronous data loading structure using clientLoader and built a unified loading experience through Suspense integration.
• Reduced production bundle size by 30% and improved performance through lazy loading, dynamic module loading, request deduplication, and React Compiler optimizations.
• Built a complex form state management system using React Hook Form and Zod, including secure file signature verification.
• Improved production monitoring security and accuracy by applying Sentry integration with hidden sourcemaps.
• Enhanced development efficiency and API reliability by introducing a standardized, type-safe API integration workflow, reducing integration errors and improving backend data consistency.
• Enhanced user experience by implementing client-side timeout handling and refetch strategies during BFF delays and gateway timeout scenarios.
• Implemented a Canary dark-release deployment strategy to replace the legacy Blue/Green process, enabling stable QA and progressive rollouts.

Naver Financial - Customer Inquiry Portal (Frontend Development, Sub Project)

• Implemented the customer inquiry page with requirement-driven UI improvements.
• Improved mobile UI stability through cross-device testing.

Naver Financial - Internal Admin Dashboard (Frontend Development, Sub Project)

• Developed internal admin dashboards using React and applied Jotai for state management.
• Integrated multiple BFF and backend APIs to support core features and ensure maintainable service interactions.

This Website - ryanch0.dev

• Built a full-stack personal blog using Next.js 15 (App Router) and Supabase for authentication, storage, and database management.
• Handled login and post creation logic on the server using Next.js Server Actions.
• Implemented a custom Markdown editor and renderer based on MDX.
• Built a Tailwind CSS–based design system and improved UI details.
• Implemented protected route handling and server-side auth verification using Next.js Middleware.
• Enhanced login security by integrating CAPTCHA and applying Redis-based IP rate limiting to block bot and brute-force attacks.
• Built an i18n locale management structure and improved routing by integrating it with Middleware.
• Optimized asynchronous rendering and loading flows using Suspense to reduce UX delays.