n8n AI Workflow Automation Developer for Order Processing

We're looking for an experienced n8n developer to build an AI-powered order processing workflow for our wholesale business. The automation should be built primarily using n8n, with Python, FastAPI, OpenAI/Claude, APIs, and PostgreSQL used where needed. Orders come from emails, spreadsheets, our website, and sales partners. The workflow should extract order details, validate data, check inventory through APIs, create draft orders in our ERP/CRM, request approval for exceptions, send follow-up emails when needed, and update Slack or Microsoft Teams. Every action should be logged with proper error handling and human approval where required. Please share: - Examples of similar n8n or AI workflow automation projects you've completed. - Your recommended technical approach. - Estimated timeline. - Current availability. - Whether you work independently or as part of a team. Also answer this in your proposal: How would you prevent duplicate orders and ensure the workflow can safely recover if an external API fails?