freeCodeCamp

How to Build a Scalable Design System in a Monorepo

Vineeth Pawar |
When you hear "Scalable Design System with a Monorepo Ecosystem" it might sound like a bunch of jargon glued together. Let's simplify: Design system: the building blocks of your product (buttons, inp... read more

How to Turn Performance Audits into AI Fix Prompts with a DevTools Extension

Olamilekan Lamidi |
Performance tools are good at showing you what's slow. They can tell you that your Largest Contentful Paint is 4.2 seconds, your JavaScript bundle is too large, or an image below the fold is loading t... read more

The EKS Cost Optimization Handbook: Reduce Your AWS Bill by 60% Using Karpenter and Rightsizing

Ayobami Adejumo |
This handbook is a complete guide to the 7-step playbook that took one EKS bill from \(85,000/month to \)34,000/month — without touching a single line of product code. I've audited EKS clusters at mor... read more

How to Organize and Maintain Azure Repositories at Scale: An Azure DevOps Engineer's Guide

Casmir Onyekani |
Managing a few of repositories is easy. And managing dozens can be challenging. But managing hundreds across multiple teams, products, and deployment environments is where things start to break down.... read more

How to Handle Errors the Right Way in Flutter: A Practical Guide to Sealed Classes, Records, and Result Types

Gidudu Nicholas |
I used to think I was handling errors well in my Flutter apps. I had try/catch blocks everywhere. I was catching exceptions, logging them, and showing error messages to users. It felt solid. Then I st... read more

The Hidden PHI Problem in Medical Images: Building a Synthetic Dataset for AI De-Identification

Lakshmi Mahabaleshwara |
In this article, you'll learn how my team built a synthetic PHI generation pipeline to create privacy-safe training and validation data for medical imaging AI. The Problem Imagine you’re building an A... read more

Pure Headless vs. Hybrid Headless CMS: Choosing the Right Architecture for Enterprise Content Management

Manish Shivanandhan |
Enterprise organisations are under constant pressure to deliver content across websites, mobile applications, customer portals, digital kiosks, smart devices, and emerging digital channels. Customers... read more

How to Build an AI-Powered, Local-First Chrome Extension That Turns Your Browsing History into an Intent Map

Shola Jegede |
Your browser remembers every page you've ever opened, but it has no idea why you opened any of them. You might spend three days comparing laptops across a dozen tabs, get distracted, come back a week... read more

How to Build an Offline AI Image Generator in Node.js with QVAC and Socket.io

Djibril-M🍀 |
A few years ago, the first day I finally got access to an AI image generator, I was so excited that I immediately sat down and wrote an article about it (using Node.js and OpenAI's DALL-E). The magic... read more

How Wearables Track the Menstrual Cycle: The Sensors, the Algorithms, and the Accuracy Gap

Shradha Puri |
Your Garmin shows poor recovery, WHOOP paints your day red, your resting heart rate is high, your HRV is low, and the app recommends that you rest. But here’s the thing: you don’t actually feel bad. F... read more