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