Frontend engineer building scalable interfaces for complex, data-heavy systems.

I focus on UI architecture, state management, and data modeling—turning messy, real-world problems into clean, predictable, and performant user experiences.

• Build frontend systems, not just components
• Design scalable state and data models
• Optimize for performance, clarity, and maintainability
• Ship products that handle real-world complexity

Multi-tenant system syncing inventory across Shopify stores in real time.

• Designed a single source-of-truth architecture across independent systems
• Built event-driven sync pipeline using webhooks + delta updates
• Solved cross-store data mapping + consistency problems
• Implemented fault-tolerant retries + validation layers

Tech: Remix, TypeScript, Prisma, Supabase

Local-first AI agent that executes actions via tools (not just chat).

• Built agent loop (plan → act → observe) using function-calling LLMs
• Designed extensible tool system (Calendar, Gmail)
• Implemented per-user memory + stateful conversations
• Optimized for local inference (Ollama)

Tech: Node.js, TypeScript

Flexible task system with complex filtering and selection.

• Designed typed tagging + query system
• Built reusable table abstractions with TanStack Table
• Optimized selection + rendering performance at scale

Tech: React, TypeScript, Supabase, Electron

Reusable React component library focused on consistency and DX.

• Built 30+ composable components
• Designed token-based theming system (dark mode + palettes)
• Focused on API design and long-term scalability

🔗 https://juno-ui.onrender.com/

Tech: React, TypeScript, Vite

LLM-powered interactive avatar system.

• Built real-time pipeline between UI and AI systems
• Optimized for low-latency interaction

Tech: React, TypeScript, Node.js

Frontend: React, TypeScript, Next.js, Vite, Electron
UI: Tailwind, CSS Modules, design systems, accessibility
State/Data: TanStack Table, Context API, REST
Backend: Node.js, Supabase, PostgreSQL
Tools: Git, Vercel, ESLint, Prettier

• GitHub: https://github.com/JunoK95
• LinkedIn: https://www.linkedin.com/in/juno-kim-007
• Email: junokimemail@gmail.com
• Website: https://www.junok.site