As an engineering manager and developer, I constantly look for ways to eliminate repetitive business friction using automation. One of the most common manual bottlenecks is bookkeeping—specifically, reading utility bills or vendor invoices and logging them into financial trackers.
To solve this, I built a production-ready, self-hosted AI Agent using a pure automation stack. It allows users to simply snap a photo of an invoice, send it over WhatsApp, and have the structured data extracted and logged automatically in seconds.
Here is a breakdown of the actual system architecture, the code nodes, and how to handle it using an AI-first approach.
The System Architecture
A robust automation pipeline requires strict separation of concerns. This entire Proof of Concept (POC) runs without an external Node.js server, relying entirely on a self-hosted orchestration engine:
