Retrieval Augmented Generation Basics with JS | CodeSignal Learn

Skip to main content

intermediate

Retrieval Augmented Generation Basics with JS

Artificial Intelligence

Trusted by learners working at top companies

Turn screen time into skills time

Practice anytime, anywhere with our mobile app.

Sign up

Join the 1M+ learners on CodeSignal

Be a part of our community of 1M+ users who develop and demonstrate their skills on CodeSignal

4 courses

56 practices

8 hours

Master RAG fundamentals in JavaScript by exploring basic concepts and retrieval techniques, constructing and querying vector databases, using semantic embeddings, and building a complete end-to-end RAG pipeline in JS.

Earn a shareable

Certificate of Achievement

Verified skills you'll gain

INTERMEDIATE

RAG Systems and Vector Databases

DEVELOPING

Text Representation

Tools you'll use

JavaScript

NodeJS

Course 1

Introduction to RAG with JavaScript

3 lessons

8 practices

Learn what Retrieval-Augmented Generation (RAG) is, why combining retrieval with generation can reduce hallucinations, and how a basic RAG workflow contrasts with naive prompting. This course is mostly informational, setting the stage for more hands-on work in later courses.

Course 2

Text Representation Techniques for RAG Systems

4 lessons

16 practices

Learn practical text‐representation methods for RAG systems: why representation matters, Bag-of-Words vs. semantic embeddings, visualizing embeddings with t-SNE, and comparing their performance in document retrieval and semantic search.

Course 3

Scaling up RAG with Vector Databases using JavaScript

4 lessons

17 practices

Build and query a vector database for RAG: preprocess documents, store chunk embeddings in ChromaDB, retrieve relevant chunks with metadata filters and weighting, craft multi-chunk prompts, manage collection updates, and scale ingestion with batch strategies.

Course 4

Beyond Basic RAG using JavaScript: Improving the Pipeline

4 lessons

15 practices

Enhance your RAG pipeline with advanced retrieval: combine BM25 and embeddings, implement iterative retrieval with query refinement and context building, constrain LLM outputs to sourced context, and optionally summarize chunks into a concise prompt.

Scan to download

Other paths you may like

Fundamental Coding Interview Prep with Python

Introduction to Programming with Python

Mastering Algorithms and Data Structures in Python

Advanced Coding Interview Preparation with Python

Full-Stack Engineering with JavaScript

Prompt Engineering for Everyone

Journey into Data Science with Python

Java Programming for Beginners

From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

+9

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

+8

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

name

Francisco Aguilar Meléndez

Data Scientist

+11

Company

About Careers Leadership Talent Science Newsroom

Collections

Generative AI Business & Leadership Interview Prep AI & Machine Learning Learn to Code Data Science & Engineering

Platform

Platform Overview Skills Assessments Live Tech Interviews AI Interviewer AI Role-Play AI Tutoring with Cosmo

Roles

Talent Acquisition Engineering Leaders Sales Leaders CS & Support Leaders IO Psychologists Individuals

Resources

Resource Library Blog Customer Stories Interview Prep API Docs

Support

Copyright © 2026 CodeSignal

Privacy Terms Compliance & Trust