Muoi N.

I am Muoi Nguyen (Teddy), Top Rated Plus Senior Developer with 6+ years and 21,000+ hours on Upwork. I build and scale production web apps the modern way — using AI-agent coding tools (Claude Code, Cursor) in my daily workflow to ship faster and cleaner than the old line-by-line approach.

I've engineered applications that serve hundreds of thousands of users and handle tens of thousands of concurrent users — including real-time, WebSocket-based features — so I design for real load: caching, async processing, horizontal scaling, and solid cloud infrastructure, not just code that works on a demo.

What I do:
✅ Full-stack web app development (Python/Django, React/Next.js)
✅ High-scale architecture — apps serving 100K+ users, 10K+ concurrent
✅ Real-time apps — WebSocket / live updates, chat, notifications, dashboards
✅ DevOps & cloud — AWS, Google Cloud, Azure, Docker, Kubernetes, CI/CD
✅ LLM API integration — AI-powered apps with OpenAI & Anthropic (Claude) APIs
✅ API development & integration (REST, GraphQL)
✅ ETL & automation / crawling pipelines
✅ POC & MVP development — fast, using AI-assisted workflows

How I work (the AI-era workflow):
⚡ AI-agent coding tools (Claude Code) for rapid, well-tested delivery
⚡ Agentic/automated workflows for repetitive engineering tasks
⚡ Integration-test automation (Playwright) so features ship verified
⚡ Clear, structured collaboration — I plan, build, review, and test in tight loops

Tech:
Frontend: React, Next.js, TypeScript, Tailwind, SCSS, HTML5/CSS3, JavaScript, jQuery
Backend: Python, Django, DRF, Django Channels, Flask, FastAPI, Celery, Node.js, Express, WebSocket, GraphQL (Apollo)
Data: PostgreSQL, MySQL, MSSQL, Elasticsearch, MongoDB, Redis, Firestore
Cloud/DevOps: AWS, Google Cloud, Azure, Docker, Kubernetes, NGINX, CI/CD
AI: OpenAI API, Anthropic Claude API, LLM app integration, AI-agent dev tooling (Claude Code, Cursor)

If you want a senior developer who builds for scale and already works the way the best teams are moving toward, let's talk.