I am building a series of n8n workflows that must bring together databases, multiple external APIs, spreadsheets, and cutting-edge LLMs in one seamless automation layer. The goal is to handle data integration, end-to-end process automation, and sophisticated API connections without manual touch points. You’ll be extending n8n beyond its out-of-the-box nodes, so solid JavaScript/TypeScript skills and full-stack experience are essential. I’ll rely on you to create custom nodes where needed, orchestrate error handling and retries, document each step clearly, and containerise the final solution (Docker preferred) for straightforward deployment. Deliverables • Fully functional n8n workflows covering database, API, spreadsheet, and LLM integrations • Any custom nodes or helper scripts with readable, commented code • Deployment guide (env setup, Dockerfile, env vars) plus a concise usage handbook • Test data or mock endpoints proving that every branch of each workflow executes correctly Acceptance criteria The workflows run end-to-end on my infrastructure, push/pull data reliably across all stated sources, and expose clear logs so I can trace every execution path.