Have you seen those new AI-generated review summaries on Amazon? They are incredibly useful for buyers, but there’s a catch: they are completely locked inside Amazon’s ecosystem.

If you are a developer, PM, or data scientist trying to analyze 5,000 scattered App Store reviews, Shopify comments, or Zendesk tickets, you are still stuck doing it manually or relying on basic word clouds.

I wanted to fix that. So, I built NEXUS 🧠—a production-grade Review Intelligence Engine that brings that exact "Amazon-style" AI analysis to any dataset.

Here is a deep dive into the architecture and how I put it together. 👇

Before jumping into massive pre-trained models, I wanted to establish a strong, custom baseline.