Courses

16 tracks · first 10 lessons of every course are free.

AI Engineering

1,886

Build production AI systems with LLMs, RAG, agents, and evals.

Start free →

C

1,219

Learn C from first principles — memory, pointers, and systems programming.

Start free →

Cloud and Infrastructure

2,989

AWS, GCP, Azure, containers, and infrastructure as code.

Start free →

Computer Science

2,872

From bits to algorithms — the core of how computing works.

Start free →

Data Science

2,145

Wrangle, visualize, model, and tell stories with data.

Start free →

Java

2,870

A practical, modern path through the Java ecosystem.

Start free →

JavaScript

2,723

The language of the web — variables, functions, async, and the DOM.

Start free →

Machine Learning and Deep Learning

3,538

Models, math, and neural networks from first principles.

Start free →

Mathematics

3,121

The mathematical foundations every engineer should know.

Start free →

Python

1,289

Bite-sized Python lessons from foundations to advanced topics.

Start free →

React

2,396

Build modern, component-driven user interfaces.

Start free →

Security

3,052

Threat models, cryptography, and defensive engineering.

Start free →

Software Engineering

1,933

How real-world software gets designed, built, and shipped.

Start free →

System Design

1,919

Design scalable, reliable distributed systems.

Start free →

TypeScript

1,796

Type-safe JavaScript: generics, inference, and scalable codebases.

Start free →

Web Development

2,982

HTML, CSS, and how the browser turns code into pages you can ship.

Start free →