AI Agent Developer for Commodity Data

I'm looking for a developer experienced in n8n, LLM APIs, and RAG to build the first of three planned AI agents for a sustainability data project. This first engagement is a single agent that researches commodity data from approved sources and exports structured results to Excel and PDF. I see it as a test project: if it goes well, I'll continue with the same developer to build the other two agents (rule-based data validation and report generation). I value a long-term collaboration. Please share relevant n8n and RAG experience.