# Day 5 of learning AI Engineering: built a small RAG app over a PDF

📰 Dev.to AI

Learn to build a RAG app that answers questions from a PDF using LangChain, OpenAI embeddings, and Qdrant

intermediate Published 19 May 2026
Action Steps
  1. Build a RAG pipeline using LangChain and OpenAI embeddings to generate answers from a PDF
  2. Run Qdrant in Docker to store and query vector embeddings
  3. Configure the RAG app to accept user questions and return answers with page numbers
  4. Test the app with a sample PDF and evaluate its performance
  5. Apply this pipeline to other data sources, such as web pages or documents, to build similar AI-powered applications
Who Needs to Know This

AI engineers and developers can benefit from this tutorial to build RAG-powered applications, while data scientists can explore new ways to interact with PDF data

Key Insight

💡 The same RAG pipeline can be used with different data sources to build various AI-powered applications

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Build a RAG app that answers questions from a PDF using LangChain, OpenAI embeddings, and Qdrant #AI #RAG #LLM
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