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,...
Beau Carnes - freecodecamp
Development
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...
Chirag Agrawal - freecodecamp
UI
A Practical Guide To Naming Things
A practical guide to naming UI components, with useful resources, naming conventions, and structures. You’ll find more [useful...
Vitaly Friedman - smashingmagazine
Design
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...
Zaira Hira - freecodecamp
Security
The Engineering Anatomy of API Vulnerabilities: A Deep Dive into the OWASP API Security Top 10
Most security articles read like threat reports. They describe vulnerabilities from the outside looking in: what an attacker does, what the impact is, and how...
Oluwaseyi Fatunmole - freecodecamp
Other
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,...
Beau Carnes - 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...
Lakshmi Mahabaleshwara - freecodecamp
API Authentication & Authorization: An Engineering Deep Dive into Mechanisms, Trade-offs, and Failure Modes
Every API has some form of authentication. But having authentication and getting it right are two completely different things. I've reviewed production...
Oluwaseyi Fatunmole - freecodecamp
How to Break the AI Coding Agent Fix Loop
You've likely seen this movie before: something breaks in an app you built with an AI coding agent. You ask the agent to fix it. It "fixes" it. But the bug is...
Amir Gabay - freecodecamp
How to Use NestJS Observe: An Observability Handbook for Devs
Observability isn't a new problem, and NestJS is certainly not the first ecosystem to tackle it. But NestJS Observe is interesting because it asks a more...
Pacifique Linjanja - freecodecamp
How AI Is Changing Email Deliverability: A Technical Guide to Sender Reputation and Inbox Placement
Sending an email doesn't always mean it will reach the recipient's inbox. Sometimes, an email is sent successfully by an application but ends up in the spam...
Reetain Raina - freecodecamp