Senior Python AI Engineer-small MVP with Python, LLM, FastAPI & PostgreSQL

I need a Python developer to help build a small MVP for a retail analytics project. The idea is simple. I want to ask questions about sales, inventory, stock, shrinkage, and products, and the system should give answers from PostgreSQL data. Example questions: What were sales yesterday? Which products are out of stock? Which branch had the highest shrinkage? Which products are overstocked? What I need: Simple PostgreSQL database setup CSV sample data import Basic KPI logic FastAPI backend Simple Text-to-SQL function OpenAI or Claude API connection Clear answer generation Basic error handling Short setup document Skills needed: Python FastAPI PostgreSQL SQL OpenAI or Claude API Docker Git Final delivery should include: Working PostgreSQL database schema Sample CSV data loaded FastAPI backend running Basic KPI calculations Natural language question to SQL OpenAI or Claude API connected Simple business answer output Setup guide When applying, please send: Your similar project experience Your idea for building this MVP How long you need When you can start This is a small MVP with $100 budget, so I only need a simple working first version, not a full SaaS product.