freeCodeCamp

freeCodeCamp

Create Scalable AI Automations with n8n

Most automation tutorials show you how to connect two simple apps and call it a day. But building workflows that companies can actually run in production requires an entirely different skill set, one
freeCodeCamp

Master Modern React Routing: TanStack Router Crash Course

Routing in modern web applications has evolved far beyond simply rendering a component based on a URL path. Developers today want end-to-end type safety, automated code splitting, seamless URL search
freeCodeCamp

How to Create System Design Diagrams using Python

Creating system architecture design diagrams is an important part of technical documentation. As system complexity grows, clarity within teams becomes even more important. But creating diagrams from s
freeCodeCamp

Build and Train a 25M Parameter LLM From Scratch on Your CPU

You don’t need a massive GPU cluster to learn how modern frontier AI works. In our new video on the freeCodeCamp.org YouTube channel, you will build, pre-train, and fine-tune a working 25-million para
freeCodeCamp

What Claude Code Can and Can't Do with Full Access Inside a Docker Sandbox

Claude Code can do more than suggest a fix. It can edit files, install dependencies, run tests, and start your application. But letting it finish a task on its own raises a practical question: how muc
freeCodeCamp

How to Encrypt PII in Data Pipelines While Keeping It Searchable

At Intuit, my team built a data pipeline that processed TurboTax e-filing data. This data needed to be made available for dashboards, analytics, and other downstream use cases. One of the biggest chal