freeCodeCamp.org

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 get two numbers and will need to determine if their ratio approximates the golden ratio. Check it out on the freeCodeCamp mobile app.

Kubernetes gets a lot easier to manage when Git becomes the source of truth for your deployments. In this tutorial, Olumoko shows you how to implement GitOps on Kubernetes using Argo CD and GitHub Actions. You'll also learn how to automate image builds, deploy manifests from Git, and keep your cluster synced through self-healing updates. freecodecamp.org/news/how-to-im…

A full-stack app needs a front end + auth, a database, an API, and a reliable way to deploy everything. In this tutorial, @cloud_girl1 teaches you how to build a full-stack CRUD app with React, AWS Lambda, DynamoDB, API Gateway, and Cognito auth. You'll also learn how to use AWS CDK to deploy the backend and CloudFront to ship the frontend over HTTPS. freecodecamp.org/news/full-stac…

Continuous Integration & Continuous Delivery helps you deliver reliable software quickly. These practices and tools are designed to automate the process of integrating, testing, & deploying code changes. In this tutorial, Juan helps you create a basic CI/CD pipeline using Python, Webhooks, and Bitbucket on Linux. freecodecamp.org/news/create-a-…

Self-hosted AI agents give you more control over where your assistant runs and how it works. In this tutorial, @manishmshiva shows you how to deploy your own 24/7 AI agent using OpenClaw on your machine or on a cloud platform. You'll also learn how to interact with it, think about key security concerns, and keep it updated. freecodecamp.org/news/how-to-de…

Testing a full-stack app can be much more complex than some tutorials make it look. So here, @ATechAjay compares manual and AI-assisted approaches to testing a real app with APIs, auth flows, and UI interactions. He also explains when to write tests by hand, when AI tools can help, and what each approach does best. freecodecamp.org/news/how-to-te…

Manual literature review can take hours. So to help you save some time, Chidozie helps you build an AI-powered research automation system with n8n, Groq, and academic APIs. You'll learn how to collect papers in parallel, deduplicate results, extract structured insights, score relevance, and handle errors. freecodecamp.org/news/build-an-…

For today's coding challenge, you'll get a number for the current floor of an elevator and an array of requested floors. You'll need to return an array of the order the elevator should visit the floors to minimize the number of floors traveled. Check it out on the freeCodeCamp mobile app.

If you're building LLM apps, they'll need more than basic monitoring. In this tutorial, Jessica teaches you how to build end-to-end LLM observability in FastAPI with OpenTelemetry. You'll trace retrieval, prompt building, model calls, token usage, cost, and evaluation signals. freecodecamp.org/news/build-end…

A machine learning model can work perfectly in a notebook and still fail when you try to deploy it. In this tutorial, Balajee shows you how to containerize an MLOps pipeline with separate training and serving containers, MLflow, and DVC. You'll also learn how to handle GPU training and tie the whole workflow together with Docker Compose. freecodecamp.org/news/container…

Go is a fast language that is often used for backend, cloud, and server-side development. In this tutorial, @njong_emy teaches you how to install Go, write your first program, and understand how packages and the main function work. You'll also learn Go basics like variables, string formatting, arrays, slices, loops, functions, maps, and structs. freecodecamp.org/news/how-to-ge…

Most web app vulnerabilities come from ordinary code patterns that trust the wrong data. In this guide, Canio shows how to fix common Node.js security issues with real Express examples. You'll learn how to prevent mass assignment, prototype pollution, race conditions, business logic flaws, and JWT misconfiguration. freecodecamp.org/news/how-to-fi…

Finding the shortest path sounds simple until you have many routes, weights, and possible paths to compare. In this video essay, @EstefaniaCassN explains how Dijkstra's Algorithm works. You'll learn about graphs, nodes, edges, weights, greedy selection, adjacency lists, and how to rebuild the final shortest path in Python. freecodecamp.org/news/understan…

React Native lets you build mobile apps for iOS and Android, but full-stack apps also need auth, data, styling, and so on. In this course, you'll build a complete grocery list app with React Native and Expo. You'll use Neon Postgres, Drizzle ORM, Clerk auth, and other popular tools, and by the end you'll have a production-style app. freecodecamp.org/news/master-fu…

For today's coding challenge, given a number of six-sided dice to roll and a target sum, return the odds of rolling that sum as a string in the format "1 in X". See if you can solve it on the freeCodeCamp mobile app.

Shaders can make visuals run fast because they use the GPU instead of drawing everything on the CPU. In this course, Patt teaches you shader programming for beginners with JavaScript and p5.js. You'll learn about WebGL, coordinate spaces, shaping functions, animation, and more, plus how to build a glowing fractal heart from scratch. freecodecamp.org/news/intro-to-…

Learning to code can feel overwhelming when you don't know where to start. So here's a course for you: Sunny teaches you Python from the ground up. You'll install Python, write your first program, learn variables, strings, operators, conditionals, and loops, then build some small apps. freecodecamp.org/news/a-beginne…

You may have heard "It worked on my machine" recently and wondered "how can this still happen?" Well, it's because local, staging, and production environments rarely stay identical, which can create production-only bugs. In this article, @manishmshiva explains why environment drift still wastes engineering time and how managed platforms can help. freecodecamp.org/news/why-it-wo…