AI Developer Needed for Multi-LLM & RAG MVP Prototype

We're looking for an experienced AI developer to build a small AI SaaS MVP/prototype demonstrating multi-LLM integration and Retrieval-Augmented Generation (RAG). This is an initial development phase with the potential for additional work after successful completion. Scope - Integrate 2–3 LLM providers such as OpenAI, Claude, or Gemini - Build a basic AI chat interface - Implement a simple RAG pipeline - Support document upload and processing - Connect the AI layer to a vector database - Create basic REST APIs - Provide clean, documented source code - Provide setup/deployment instructions Preferred Tech Stack Frontend: Next.js, React, TypeScript Backend: Python, FastAPI AI: OpenAI / Claude / Gemini, LangChain or LangGraph Database: PostgreSQL / Vector Database Deployment: Docker Deliverables - Working multi-LLM integration - Basic RAG/document-question-answering workflow - Functional AI chat interface - Source code - Setup and configuration documentation