freeCodeCamp.org

Microservices shift some complexity from the backend into the frontend of your apps. In this article, @abisoyeOladayo shows you how to coordinate multiple services, handle inconsistent data, and design around latency. He covers API contracts, fallbacks, and strategies for building reliable user experiences. freecodecamp.org/news/how-to-na…

For today's coding challenge you'll determine whether a number is a narcissistic number. What's that mean, you might ask? Find out on the freeCodeCamp mobile app.

Large PDF files can be slow to upload and share. So in this guide, @allinonetools shows you how to compress PDFs directly in the browser using JavaScript libraries. You’ll reduce file size by optimizing images and rebuilding documents client-side. freecodecamp.org/news/how-to-co…

Every year for the past 12 years, Stanford has hosted TreeHacks, one of the largest student hackathons in the world. Over 36 hours, participants brainstormed and built with as much creativity as they could muster. In this documentary, Quincy interviews tons of attendees and they share their projects, insights, and what they learned. freecodecamp.org/news/inside-st…

LLM features rarely ship as clean, randomized experiments. In this tutorial, Rudrendu teaches you how to use propensity score matching to compare similar users and isolate real effects. He walks you through feature engineering, modeling, and evaluation in Python. freecodecamp.org/news/product-e…

In this episode of the freeCodeCamp podcast, Quincy interviews Stanford's youngest instructor, Rachel Fernandez. She recently helped organize Stanford's TreeHacks Hackathon. They talk about the current state of CS education, the continued importance of C++, how to avoid "deskilling" when using AI tools, and. more. freecodecamp.org/news/stanford-…

If you want to add an AI-powered chatbot to your website, this tutorial is for you. And you'll use Cloudflare's serverless stack to avoid the high monthly fees that come with some other tools. Mayur walks you through setting up the project, building the backend worker and frontend widget, deploying it to Cloudflare, and more. freecodecamp.org/news/how-to-bu…

If you've ever wondered how a smart fridge or home security system works, this handbook's for you. In it, @sohamstars teaches you all about embedded systems - the little computers that power these devices. You'll learn about firmware design, embedded development, drivers, debugging, and lots more. freecodecamp.org/news/learn-emb…

Have you ever wondered how LLMs work? Well, there's both basic theory & modern techniques like RLHF (reinforcement learning from human feedback). Here, you'll learn how to train a tiny model, scaling up, RLHF, & more. freecodecamp.org/news/code-an-l…

Happy Star Wars Day! For today's coding challenge, you'll build a parsec converter. Check it out on the freeCodeCamp mobile app, and May the 4th Be With You...

These days, AI tools can do things like read messages, reason about them, and call functions on their own. And LangChain is a popular tool that lets you link language models, tools, and apps together. In this tutorial, @manishmshiva helps you build and deploy your own AI agent with LangChain, FastAPI, & Sevalla. freecodecamp.org/news/build-ai-…

If you've been wanting to learn more about music production, this course is for you. Miguel teaches you all about sound design, mixing, music distribution, and more. By the end, you'll know how to use the popular FL Studio to build a high-energy Bass House track from scratch. freecodecamp.org/news/learn-mus…

We use all kinds of smart devices these days, from fridges & coffee makers to fitness trackers and ATMs. And in this handbook, @sohamstars teaches you all about the software that powers them. You'll also learn how the hardware works, how to manage memory and power, how to handle timing and communication, & more. freecodecamp.org/news/learn-emb…

When you hear "real-time", you might think of websockets or instant refreshes on web app dashboards. But the systems engineering definition is a bit different - and focuses primarily on predictability. In this guide, you'll learn what real-time systems are (and what they're not) and how to build a soft real-time system in Go + React. freecodecamp.org/news/real-time…

If you want to learn about the math that powers AI tools, this book is for you. In it, Tiago gives you insights into what makes AI models really work so you can understand them better. You'll learn about Linear Algebra, Multivariable Calculus, Probability & Statistics, Optimization Theory, and lots more. freecodecamp.org/news/the-math-…

Whenever you visit a website, your device talks directly to another server on the internet. Everything is visible - your IP address, location, & basic network info. And sometimes you don't want that. This is where a proxy server comes in handy. And here, @manishmshiva explains what they are & how they work. freecodecamp.org/news/a-develop…

For today's coding challenge, given a string in "HH:MM" format (24-hour clock), you'll need to return the proper greeting for that time of day or night. Check it out on the freeCodeCamp mobile app.

The R programming language is a powerful tool for data analysis, data visualization, and statistical modeling. And if you want to learn how to leverage it in your projects, this tutorial has you covered. You'll learn how to load real-world data into R, visualize patterns using ggplot2, build & interpret your models, and more. freecodecamp.org/news/how-to-cr…

Antigravity is a tool from Google that lets you describe requirements & work with AI agents to build projects. And to help you learn how it works, Anna walks you through using it to build a water tracker app. You'll learn about agentic prompting, persisting the data, adding reminders, and more. freecodecamp.org/news/build-an-…

Want to pass the Databricks Data Engineer Associate exam? Then this is the course for you. It covers everything SQL commands & logic, Delta Lake, cluster types, & more. freecodecamp.org/news/prepare-f…