I'm a frontend developer who believes great web experiences start with a solid understanding of HTML, CSS, and JavaScript — the true foundation of the web. Frameworks come and go, but the fundamentals always remain.
- Core: HTML/CSS/JavaScript — the web platform itself
- Extended with: TypeScript, Vue.js, Nuxt.js, Next.js
- Working at: Hivelab as a frontend developer
- Currently exploring: Web performance, accessibility, and modern CSS
- For fun: Building small games with Unity
Foundation
Extended
Tooling
| Project | Description | Stack |
|---|---|---|
| tube-player | Custom YouTube player library — popup & inline modes, ~7KB gzipped, framework-agnostic | JavaScript / Vite |
| weather | Real-time weather app with geolocation, 5-day forecast, and Canvas-based animated backgrounds | Next.js 16 / TypeScript / Tailwind CSS v4 |
| korea-holiday | Korean public holiday data library | TypeScript |
| harness-100 | 100 production-grade Claude Code agent team harnesses across 10 domains | Claude Code / Markdown |
Things I find genuinely interesting and keep coming back to:
Web Platform
- Modern CSS — container queries, cascade layers,
@starting-style, scroll-driven animations - Web Performance — Core Web Vitals, INP, rendering pipelines, bundle analysis
- Accessibility — semantic HTML, ARIA patterns, keyboard navigation
Frameworks & Libraries
- React — component architecture, hooks, server vs. client components
- Next.js — App Router, RSC, streaming, edge rendering
- TypeScript — type-level programming, utility types, strict mode patterns
AI & Tooling
- Claude Code & agent workflows — building multi-agent harnesses, prompt engineering
- LLM-assisted development — integrating AI into everyday dev workflow
Game Dev (Hobby)
- Unity — C# scripting, 2D/3D mechanics, shader basics
- GitHub — github.com/hellomrma
- LinkedIn — linkedin.com/in/hellomrma
- Email — hellomrma@gmail.com
- Resume — resume.playgrounder.dev
Always learning. Always building.