Monthly Archives: July 2026

Two years ago, AI coding tools were a curiosity. Agencies let junior devs experiment with them on internal tools and side projects, the kind of work where nothing broke if the code was bad. Client work stayed handwritten. Nobody was betting a deadline on autocomplete. That era is over. The same tools now sit at […]

When developers transition from the relational world (MySQL, PostgreSQL) to Firestore, Firebase’s NoSQL document database, they often bring their old habits with them. They try to replicate tables, foreign keys, and joins. The result? Complex queries, skyrocketing read costs, and a database structure that becomes a nightmare to maintain after just a few features. To […]

If you’ve ever loved the speed of building backend servers with Express.js, but wished you didn’t have to guess at types or debug silly runtime errors, we just posted the perfect tutorial for you. Our new video course, TypeScript in Express, is now live on the freeCodeCamp.org YouTube channel! In this hands-on tutorial, instructor Rachel […]

You’ve built and consumed APIs. You know what a GET request is, what a JSON response looks like, and how to add an Authorization header. You’ve used REST, maybe tried GraphQL, and perhaps heard of gRPC. But do you know what actually happens when your application sends a request? What travels through the wire? Why […]

Imagine your team deployed Prompt A globally two weeks ago. Tight deadlines and high confidence meant the rollout hit 100 percent of users without any A/B testing, shadow traffic, or holdout groups. While completion rates appear stable, a colleague presents a new prompt from a staging environment late at night, and that sparks the real […]

In this tutorial, you’ll build a production-ready PayPal payment service using NestJS microservices. Along the way, you’ll learn how to isolate payment logic into its own service, communicate between services using gRPC, publish payment events with RabbitMQ, and deploy everything with Docker. By the end, you’ll have a scalable payment architecture that can be reused […]

Every application, at some point, has to deal with a fundamental challenge: something happens, and several other things need to react to it. A user logs in, and the app needs to save a token, cache the user profile, fire an analytics event, and navigate to the home screen. A payment is confirmed, and the […]

Have you been wanting to learn how to code but found it a bit too overwhelming or confusing? We just published a brand new course on the freeCodeCamp.org YouTube channel that is designed specifically for absolute beginners. This comprehensive Python tutorial, created by Sunny Damalu, takes you from beginner to building your own functional real-world […]

Are you ready to unlock the true rendering power of your computer and create breathtaking visuals? We just published a new course on the freeCodeCamp.org YouTube channel that will teach you the fundamentals of graphics programming. This beginner-friendly course, developed by Patt Vira, is designed for anyone eager to break into WebGL and the math […]

Do you want to get into mobile development and build cross-platform applications? We just published a comprehensive new course on the freeCodeCamp.org YouTube channel that will teach you how to build a complete, full-stack React Native application from the ground up. In this massive tutorial, you will develop a feature-rich grocery list app that runs […]