freeCodeCamp.org

Distributed systems can break when a database write succeeds but the event publish fails. In this tutorial, @pliutau teaches you how to implement the Outbox Pattern in Go and PostgreSQL so data writes and event records happen atomically. You'll also learn how to build a relay service, work with an outbox table, and handle at-least-once delivery in event-driven systems. freecodecamp.org/news/how-to-im…

Ghost CMS can be tricky to run locally on Windows or with Docker. In this guide, @AbdulTa62185243 shows you how to fix SQLite installation failures in WSL, Docker container crashes, and ActivityPub loading errors. You'll also learn how to get to a stable local Ghost setup by using WSL correctly, simplifying Docker resources, and configuring Ghost's social web features. freecodecamp.org/news/fix-ghost…

Starting a presentation from a blank slide can make it hard to figure out the story you want to tell. In this tutorial, Omer shows you how to use Claude Code and Marp to brainstorm a deck, react to a first draft, and iterate on the slides in Markdown. You'll also learn how to preview the deck in VS Code and export it to HTML and PowerPoint when you're ready to present. freecodecamp.org/news/how-to-us…

Atomic CSS might seem like just a styling technique, but it shares ideas with functional programming. In this tutorial, Ramazan teaches you how concepts like purity, immutability, and composition help explain how Atomic CSS works. You'll also see how utility-first classes can make styles more predictable, reusable, and easier to reason about in larger projects. freecodecamp.org/news/atomic-an…

For today's coding challenge, you'll get a 6x6 matrix representing a QR code. Your task will be to return the string of binary data in the code. See if you can solve it on the freeCodeCamp mobile app.

Forms often create friction that leads to abandoned signups, carts, and other lost conversions. In this article, Oleh teaches you how to automate form UX audits for error messages, hint text, and keyboard navigation flows. You'll also learn how to prioritize fixes, connect findings to business metrics, and run these checks in your development workflow. freecodecamp.org/news/automate-…

Testing is what helps keep software reliable after you ship new features. And in this course, Beau teaches you software testing fundamentals like the testing pyramid and TDD. You'll use Playwright to test a real e-commerce app & also learn about API testing, debugging, accessibility checks, mocking, CI/CD practices, and how AI tools like KaneAI fit into modern testing workflows. freecodecamp.org/news/software-…

Building an e-commerce app means handling products, auth, payments, state, and deployment together. In this course, you'll learn how to build a full-stack e-commerce app with Next.js, Supabase, Zustand, and Paystack. You'll also learn authentication, server actions, API routes, reviews, cart state, and how to deploy the finished app on Vercel. freecodecamp.org/news/build-an-…

Building projects is one of the best ways to improve your web development skills. In this course, you'll build 19 projects with HTML, CSS, and JavaScript, like quizzes, Kanban boards, and API-based apps. You'll also practice form validation, local storage, drag and drop, UI design, and working with external APIs in real projects. freecodecamp.org/news/build-19-…

Slow Docker builds can make small code changes take much longer to ship than they should. In this guide, Balajee explains how Docker build cache works, what causes common cache misses, and how to restructure your Dockerfile for faster rebuilds. You'll also learn how to use .dockerignore, multi-stage builds, BuildKit cache mounts, and CI/CD cache backends to cut build times dramatically. freecodecamp.org/news/how-to-op…

Eid Mubarak to everyone around the world who's celebrating!

Today is the Spring Equinox - meaning the sun is directly above the equator and perfectly overhead at noon. For your coding challenge, you'll need to determine how long of a shadow a 4-foot pole casts at a given time. Check it out on the freeCodeCamp mobile app.

A Flutter app can be hard to ship safely when builds, signing, environment configs, and store releases are still manual. In this tutorial, @devseyi helps you build a production-ready Flutter CI/CD pipeline with GitHub Actions. You'll also learn how to distribute tester builds with Firebase and TestFlight, upload Sentry symbols, and automate deployment. freecodecamp.org/news/how-to-bu…

A lot of RAG tutorials work locally, then fall apart when you try to ship them. In this handbook, @dannwaneri teaches you how to build a production RAG system with Cloudflare Workers, Vectorize, and Workers AI. You'll also learn how to handle loading, querying, error handling, and performance while keeping costs low. freecodecamp.org/news/build-a-p…

Automation powers much of modern software development these days. And in this course, you'll learn how CI/CD works in production with Jenkins. It covers the SDLC and branching strategies, pipelines, how to build and deploy a Dockerized app, and lots more. freecodecamp.org/news/ci-cd-in-…

If you're a freelance dev - or want to become one - this podcast interview is for you. Quincy chats with Luke Ciciliano, developer and consultancy owner - who's been freelancing for decades. They talk about how AI can help create more small business customers, how to engage with clients and close a deal, and lots more. freecodecamp.org/news/how-to-la…

Writing clean code helps you build scalable, maintainable software applications. And in this handbook, @shahancd explains what clean code is and why it's important. He also walks you through some helpful coding patterns & discusses comments, naming conventions, functions, project structure, and lots more. freecodecamp.org/news/the-clean…

Machine learning projects aren't over when your model works in a notebook. In this tutorial, Sandeep helps you build an end-to-end ML platform locally with MLflow, Feast, FastAPI, Great Expectations, and Evidently. You'll also learn how to add Docker and GitHub Actions for testing, monitoring, and CI/CD. freecodecamp.org/news/build-end…

For today's coding challenge, you'll invert a matrix. Have you ever done that before? See if you can figure it out on the freeCodeCamp mobile app.