AI-Powered Business Process Automation Using Python + Google Workspace

We are looking for an experienced AI/automation developer to build an intelligent business process automation system that integrates with our Google Workspace (Gmail, Sheets, Calendar, Drive). What we need: We want an AI agent that can handle repetitive business tasks automatically: Invoice Processing -- When a PDF invoice arrives in our Google Drive or email, the system should extract key data (vendor, amount, date, line items), validate it against our internal policies, log it to a Google Sheet, and send a confirmation email. Email Triage -- Incoming emails should be automatically classified (support request, sales inquiry, internal) and either drafted a reply or routed to the correct team member. Appointment Scheduling -- When a scheduling request comes in, the agent should check calendar availability, propose times, and create the event once confirmed. Key Requirements: Python backend with LangGraph or similar agent framework RAG (Retrieval-Augmented Generation) to give the agent context about our company policies, contacts, and templates Google Apps Script triggers to kick off workflows automatically A web dashboard where we can see workflow runs, logs, and results in real-time Human-in-the-loop approval for sensitive actions (sending external emails, large payments) Technical Stack (preferred): Python, FastAPI, LangGraph OpenAI API (GPT-4o) ChromaDB or similar vector database for RAG Google APIs + Google Apps Script Next.js or React frontend for the dashboard Deliverables: Fully functional automation backend with at least 3 workflow types Google Apps Script integration for automatic triggers Web dashboard showing workflow execution and logs Documentation and setup guide Source code with clean architecture