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Build RAG Applications with LlamaIndex and JavaScript [NEW] (Udemy.com)

Build, Optimize, and Deploy Custom Data Engines Using LLMs, Advanced Selection Techniques, and RAG in JavaScript

Created by: Paulo Dichone

Last updated November 2024

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What you will learn

  • Master the Fundamentals of LlamaIndex: Students will master the core concepts of LlamaIndex, including its key components such as RouterQueryEngine
  • Design and Implement Custom Query Engines: You will design and implement custom query engines using LlamaIndex.
  • Create and Integrate Modular Tools: Students will create and integrate modular tools within LlamaIndex.
  • Develop Agents and Tools that can Intelligently do Tasks Autonomously
  • Build a Full-stack Web Chat App with one Single CLI Command

How it compares

Against the other 1,182 rated Udemy courses in IT & Software on CourseDuck:

  • Rating4.6 out of 5higher than 67% of them
  • Reviews315#708 of 1,183 by number of reviews
  • Length3 hoursshorter than 71% of them
  • Last updatedNovember 2024earlier than 59% of them

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Course Description

Unlock the power of Retrieval-Augmented Generation (RAG) and elevate your data-driven applications to the next level with this hands-on course on building RAG applications using JavaScript and LlamaIndex.

Whether you're a developer, data scientist, or AI enthusiast, this course will equip you with the skills to design, implement, and optimize advanced query engines that seamlessly integrate Large Language Models (LLMs) into your JavaScript applications.

In this course, you'll dive deep into the world of LlamaIndex, a powerful framework for creating custom, modular data engines. You'll learn how to leverage RAG techniques to build applications that retrieve and process data efficiently and generate contextually relevant responses. With a focus on real-world applications, this course will guide you through the entire process, from setting up your development environment to deploying your RAG-powered applications.

What You’ll Learn:

  • Master the Fundamentals of RAG: Understand the core principles of Retrieval-Augmented Generation and how it enhances data retrieval and generation in modern applications.

  • Build Custom Query Engines: Learn to design and implement custom query engines using LlamaIndex, integrating various indexing strategies and optimizing them for specific use cases.

  • Hands-on JavaScript Integration: Gain practical experience in using JavaScript to build and deploy RAG applications, bridging the gap between theory and real-world application development.

  • Utilize LLMs and Advanced Selection Techniques: Explore integrating LLMs with advanced selection mechanisms to intelligently route queries and generate precise, context-aware responses.

  • Deploy Scalable Data Engines: Learn how to deploy your RAG-powered applications, ensuring they are optimized for performance and scalability in real-world scenarios.

Why This Course?

This course is not just about learning concepts; it's about applying them. Through a series of hands-on projects, you'll build fully functional RAG applications that you can use in your projects or showcase in your portfolio.

Whether you're looking to enhance your current skill set or explore new possibilities in AI-driven development, this course offers the practical experience and knowledge you need to succeed.


Join me in this journey to master RAG with JavaScript and LlamaIndex and start building smarter, more responsive applications today!

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Instructor Details

Paulo Dichone

Hi, I’m Paulo – Your Guide to Mastering Development, Cloud, and AI Engineering

With a passion for empowering learners, I’ve had the privilege of teaching over 350,000 students across 175 countries. Whether you’re diving into Android, Java, Flutter, AWS Cloud, or venturing into the world of AI engineering, I’m here to help you unlock your full potential.


My Expertise

I bring extensive hands-on experience in:

    AI Engineering 

    Mobile App Development (Android & iOS)

    Cross-Platform Development (Flutter, Dart, and JavaFX)

    AWS Cloud Solutions


And now, I’m also focused on the AI engineering landscape, helping developers leverage the power of machine learning and automation in their projects.


My Mission

No matter where you are in your journey—whether you're just starting or looking to sharpen advanced skills—my courses are designed to make you an exceptional developer and AWS Cloud Practitioner, equipped to tackle real-world challenges. Beyond coding, I enjoy spending time with my growing family, playing the guitar and mandolin, and traveling whenever I get the chance.


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Reviews

4.6

315 ratings on Udemy

Select a bar to show only those reviews.Select the bar again to show every rating.

By Ritwick Sharma on 9/3/2026

good stuff to get best in AI

By Kratika Agarwal on 8/26/2026

It is a good session.

By Rishav Rishav on 8/18/2026

The course could be even better if the code were explained with proper writing rather than just being pasted. Although the explanations are good and to the point, you can learn more in less time.

By Sandeep Chandran on 2/26/2025

So far the course is exactly as I expected. The instructor is very clear and breaks down the complexity of Llamaindex in an understandable way.

By Ram Singh on 2/24/2025

Later version of llamaindex has deprecated many methods such as `PDFReader` etc.. tried to read using pdf-parse but VectorStoreIndex doesn't accept that. Not able to run example.

By Andre House on 11/16/2024

The presenter excels at explaining concepts in detail. The course is easy to follow, with each section building on the last to deepen your understanding as you progress through the material.

By Jaime Hernandez on 9/25/2024

I thoroughly enjoyed this course! Paulo Dichote did an excellent job explaining the key concepts of LlamaIndex and Retrieval-Augmented Generation (RAG). His clear and concise teaching style made it easy to grasp complex topics, such as: Designing and implementing custom query engines Integrating modular tools Developing intelligent agents that autonomously execute tasks Building a full-stack web chat application with a single CLI command The hands-on approach and real-world examples really helped solidify my understanding. This course is a must for anyone looking to dive deep into AI, data retrieval, and LLM integrations. Highly recommended! Thank you, Paulo, for such an insightful and well-structured course!

By Satyam Singh on 9/9/2026

By Vinothkumar Rajendran on 9/2/2026

By Ravulapalli Papa Rao on 8/27/2026

Showing all 10 reviews on CourseDuck

Read all 315 reviews on Udemy

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Overall Score : 92 / 100