AI Chat Integration for Existing Website

Project Description:
I am looking for an experienced Full Stack Developer with AI integration experience to add a simple AI-powered chat feature to my existing website.
Requirements:
Integrate OpenAI API (or similar LLM API)
Create a basic chat interface
Connect frontend and backend
Store conversation history in a database
Clean and responsive UI
Provide source code and setup instructions
Tech Stack (Preferred):
React / Next.js
Node.js or Python backend
PostgreSQL or MongoDB
Deliverables:
Working AI chat feature
Source code
Deployment guidance
Ideal Candidate:
Experience with AI/LLM integrations
Strong web development skills
Good communication
Ability to complete within 1–2 days