Full-Stack AI Chatbot with OpenRouter Integration | MERN + NestJS + Redux

This is a full-stack AI chatbot application designed and developed from scratch. The platform simulates real-time conversations between users and an intelligent assistant, powered by modern AI models through OpenRouter.

I handled both frontend and backend development, UI/UX design, deployment, and integration with external AI services.

Key Features:

Built with NestJS + MongoDB on the backend

React.js + Redux Toolkit for frontend with real-time updates

Authentication using JWT

Full CRUD operations for chats and messages

Supports user and assistant message types

Responsive design for all screen sizes (Mobile / Tablet / Desktop)

API documentation created using Swagger