For today's coding challenge, you'll build a tip calculator! Might come in handy next time you go out to eat (if you live somewhere with a tipping culture!)...check it out on the freeCodeCamp mobile app.

Wishing a very Happy Diwali to all those around the world getting ready to celebrate! 🪔 ✨

If you really want to understand how LLMs work, try coding your own version of one from scratch. And that's exactly what you'll do in this course: build a Llama 4-like LLM from the bottom up. You'll build a tokenizer, learn about the attention mechanism, dive into Rotary

If you're prepping for tech job interviews, you should know how to apply data structures & algorithms to coding challenges. And this course helps you learn the key DSA you'll need to know with plenty of examples. It covers arrays, sets, hashmaps, Big O notation, sliding window,

Vim is a powerful, customizable text editor that many devs swear by. It has a steep learning curve for beginners, but this course helps smooth that out for you. @andrewbrown teaches you about Vim's history, customization & plugins, and core commands. https://t.co/MbJNbnpoSe

If you want to practice your AI and coding skills, this tutorial is for you. In it, Arunachalam helps you build an AI-powered bot using Node.js, Gemini, & other popular tools that can help you post to social media. You'll learn how to automate fetching data from an API,

Sometimes it's helpful to visualize your network traffic in real-time. So here, @chairahalkar helps you build a network traffic dashboard with Python and Streamlit. You'll learn how to capture raw network packets from the NIC, process the data, and create visualizations that

Understanding basic AI and Machine Learning concepts is becoming essential for devs. But getting started and learning all the key terms and core ideas can seem overwhelming. In this course, Vladimirs covers concepts like variance, p-values, confusion matrices, neural

When you're building Django projects, you'll often need to connect a database. And in this guide, @_udemezue walks you through how to use PostgreSQL in Django. He explains why it's a good fit, helps you install everything & create your DB, shows you how to run migrations, and

When you're writing code, sometimes you may not even know it's broken or vulnerable until something bad happens. So Manish wrote this guide to help you identify common issues that'll make your code less safe. He talks about missing input validation, poor error handling, no rate

When you're building an application, different parts need to communicate - both within the app and with the outside world. This is made possible by APIs - and REST has become a popular way to architect your APIs. Here, @KraneOliver teaches you key REST API principles by walking

Data pipelines let you collect, process, and use huge amounts of data efficiently. But building and maintaining these pipelines can be tricky with API rate limits, changing data schemas, etc. In this in-depth course, you'll learn about data ingestion & normalization, data

Docker lets you package your app along with all its dependencies into a container. This means your app will run the same on your machine, your coworker's machine, in testing, and in production. In this tutorial, @_udemezue shows you how to Dockerize your Django projects &

Large Language Models like ChatGPT can help you get a lot done as a dev. For example, creating dynamic user interfaces, navigating through tons of textual data, and more. In this course, you'll learn the basics & how to use LLMs in your coding projects.

When you're building web apps, performance is a key aspect to consider. After all, you don't want your users leaving before the app finishes loading. Here, @Timi471 teaches you how to optimize your Next.js web apps for better performance. https://t.co/1eE4kl5gvI

Learning about algorithms is a key step in prepping for dev job interviews. And this course teaches you 10 popular ones that often come up in coding challenges. It covers array chunking, max char, fizz buzz, the pyramid string pattern, and more. https://t.co/Zd5KWg4zpQ

Machine learning lineage is a framework that helps you track and understand a ML model's whole lifecycle. It helps with validation, tracing back through changes when models fail, providing proof of training, and more. In this in-depth guide, Kuriko walks you through building an

When you're building an application, you likely don't want all users to have the same level of access. This is where role-based access control comes in handy. In this guide, @LeomOfThings teaches you how to set up RBAC with custom claims ising Firebase rules.

This weekend build an MCP server for whatever project you're building right now. freeCodeCamp just published a FREE course that will show you how using the open source FastMCP Python library. 🐍 Here are this week's five freeCodeCamp resources that are worth your time 🏕️ 1.

Go makes it easy to build APIs that are super fast from the get-go. But as you get more users, Go's natural speed might not be enough - and you'll need to set up caching. In this guide, @t_koded shows you four ways to cache Go API responses for high performance.