freeCodeCamp

The AI Agent Engineer's Guide: 60 Patterns for Building Autonomous Systems [Full Book]

Vahe Aslanyan |
This book is a capability-led field guide to the architectures that make modern AI agents actually work. It includes code, failure modes, and illustrative composite case studies for every pattern. Abo... read more

How to Build a Knowledge Graph with Python and Neo4j [Full Handbook]

RONI DAS |
Most of the data you work with is really about relationships. A customer belongs to an account. An incident affects a service. An engineer owns a repository. You store all of that in tables, and for a... read more

The Hidden Risks Lurking in Your Cloud Infrastructure

Manish Shivanandhan |
Cloud computing has changed how organisations build, deploy, and scale applications. Businesses can launch new services in minutes, expand into new markets, and reduce the cost of maintaining physical... read more

Learn System Design for AI Agents: Build a Production-Ready Multi-Agent PR Reviewer

Beau Carnes |
Building a basic AI demo with a single completion prompt and simple RAG pipeline is easy, but taking agentic systems into production requires robust system design, reliability engineering, and failure... read more

Learn Data Structures and Algorithms Visually

Beau Carnes |
Learning Data Structures and Algorithms (DSA) often feels like facing an challenging wall of complex jargon, syntax, and heavy mathematics. But don't worry because we just posted a course on the freeC... read more

Building a Reinforcement Learning Framework from Scratch in Pure C

Beau Carnes |
High-level machine learning libraries like PyTorch and TensorFlow make training intelligent agents straightforward, but relying on modern frameworks often hides the complex mechanics working under the... read more

High-Frequency Real-Time Data in React: From Ring Buffers to OffscreenCanvas

Vineeth Pawar |
React is great at many things. But if you've ever tried pushing thousands of data points per second through it, you'll quickly learn that React isn't a firehose. It's more like a garden hose. Try forc... read more

What to Do if Your Site Is About to Hit Vercel's Free Image Optimization Cap

Md. Fahim Bin Amin |
I maintain my own website, and every now and then I upgrade the site to a new version. And I frequently experiment with different technologies and architectures while doing so. Recently, I faced an is... read more

How to Build More Accessible Websites with WCAG 2.2

Aiyedogbon Abraham |
A website can look polished, work perfectly with a mouse, and still be difficult for some people to use. A form might use colour as the only indication that something went wrong. A sticky header might... read more

How to Work with Material and Cupertino Decoupling in Flutter [Full Handbook]

Atuoha Anthony |
Earlier this year, I published Decoupling Material and Cupertino in Flutter, which covered what was then a preview feature: Flutter's plan to separate the Material and Cupertino design libraries from... read more