Nhi N.

Full-Stack - Next.js, Node.js, React Native(Expo) | AI (RAG)

I help SaaS startups build and scale AI-powered applications across web and mobile using React.js, Next.js, Node.js, Nest.js React Native(Expo), and OpenAI (RAG systems). Whether you’re adding AI features, dealing with messy architecture, or scaling beyond MVP — I design and build systems that are reliable, maintainable, and production-ready. 💡 What I Can Help You With • Build AI features (chatbots, copilots, automation workflows) • Develop RAG systems (vector databases, retrieval optimization, accuracy improvements) • Integrate OpenAI APIs into your SaaS product • Build scalable full-stack apps (Next.js, Node.js, Supabase) • Refactor messy codebases into clean, maintainable systems • Design SaaS architecture (multi-tenant, RBAC, billing systems) • Build AI-powered workflows using OpenAI & Claude, accelerated with tools like Cursor 📈 Real Impact • Built AI-powered features used in real production environments • Helped startups move from MVP → scalable, stable systems • Delivered web + mobile products used by real users • Improved performance, reliability, and long-term maintainability 🧠 Tech Stack Frontend: Next.js, React.js, TypeScript, Vue.js, Nuxt.js Mobile: React Native (Expo), Flutter, cross-platform architecture Backend: Node.js, NestJS, Python, APIs AI: OpenAI, RAG systems, vector databases Tools: Cursor, AI-assisted development workflows Database: PostgreSQL, Supabase, Redis Infrastructure: AWS, Docker ⚙️ How I Work I focus on: • Clean architecture → easier to scale and maintain • Performance → fast and reliable systems • Simplicity → avoid overengineering • Business outcomes → not just code Good systems don’t just work — they keep working as you grow. 🤝 Best Fit • SaaS startups adding AI features • Founders scaling beyond MVP • Teams with messy or fragile systems • Products needing production-ready AI integration 👉 If you need someone who can design and build AI systems end-to-end (web + mobile), I can help.