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I Built a RAG Chatbot Platform With Java Spring Boot and Next.js

This story is from 2026-09-25. It is preserved in the archive; the latest stories are on the live feed.

TL;DR I built an AI Chatbot Platform: a SaaS where you upload PDFs, URLs, or plain text, and it turns that content into a chatbot that only answers from what you gave it. Under the hood it's a RAG (Retrieval Augmented Generation) pipeline: pgvector with an HNSW index for similarity search, and a tw…

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  1. 2026-09-25 07:00 · DEV Community — AI
    I Built a RAG Chatbot Platform With Java Spring Boot and Next.js

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