# Nguyễn Thành Đạt (datnt)

> Senior Fullstack Developer and Shopify Expert based in Hà Nội, Vietnam. Building web, mobile, and native macOS/Windows apps since 2018, plus 100+ free, browser-only developer tools at tools.datnt.dev. Open to freelance and collaboration.

Contact: hi@datnt.dev (replies within 24h). Languages: Vietnamese (native), English (professional). Timezone: GMT+7.

## Profile

- [Portfolio , datnt.dev](https://datnt.dev): interactive creator portfolio; a "View OS" button opens a desktop-OS version
- [Full profile for agents](https://datnt.dev/llms-full.txt): complete bio, skills, experience, projects, FAQ
- [Developer CV (PDF)](https://datnt.dev/Nguyen-Thanh-Dat-CV.pdf): single-column résumé
- [GitHub](https://github.com/ntd4996)
- [LinkedIn](https://www.linkedin.com/in/ntd4996)
- [X / Twitter](https://x.com/ntd4996)

## Services

- Web development: React, Next.js, Node.js (NestJS), PostgreSQL, Redis
- Shopify: Liquid, custom themes, custom apps, Hydrogen headless storefronts, Storefront API
- Native apps: macOS & Windows (Swift, SwiftUI, AppKit, Tauri), notarized and auto-updating
- Mobile: React Native, Expo, Flutter
- AI engineering: Claude API, OpenAI, LangChain, RAG/embeddings, AI agents
- Game development: Unity, C#
- UI/UX design: Figma

## Projects

- [AgentPet](https://github.com/ntd4996/agentpet): open-source macOS & Windows desktop pet that watches your AI coding agents (Claude Code, Codex, Gemini CLI) in real time
- [PlugTalk](https://plugtalk.thenightwatcher.online/): commercial macOS app with offline-first Ed25519 licensing; plays a sound on every USB plug/unplug
- [Porthole](https://github.com/ntd4996/Porthole): open-source macOS menu bar app showing dev ports, their owning project, and tunnels
- [tools.datnt.dev](https://tools.datnt.dev): 100+ free, 100% client-side developer & utility tools, no tracking, no ads

## Hiring

- Available for freelance and collaboration: web, Shopify, mobile, native apps, AI integration.
- Not taking: crypto, gambling, MLM, or rushed MVPs under one week.
- Works well with Japanese and international clients (remote-first; onsite Hà Nội possible).
- Rate and scope discussed by email: hi@datnt.dev

## Optional

- [Developer tools sitemap](https://tools.datnt.dev/sitemap.xml)
- [Main sitemap](https://datnt.dev/sitemap.xml)
- [Certificate , Claude Code in Action (Anthropic)](https://verify.skilljar.com/c/sfzhzsfe8zg6)