freeCodeCamp

How to Optimize Enterprise Knowledge Graphs for Scalable Digital Product Platforms

Kamal Kishore |
Enterprises are building more and more digital products that depend on real time intelligence. This means that being able to connect, contextualize, and reason over data has become a core capability.... read more

How to Build a Browser-Based PDF Metadata Editor Using JavaScript – A Step-by-Step Guide

Bhavin Sheth |
PDF files contain more information than what appears on the page. Behind every PDF document is metadata that stores information such as the document title, author, subject, keywords, creator applicati... read more

How to Choose the Best Stock Market API for FinTech Projects and AI Agents

Nikhil Adithyan |
Choosing a stock API looks simple until the project becomes real. At first, you only need a few prices. You send a request, get JSON back, load it into pandas, and move on. But the moment that API sta... read more

How Attribute-Based Access Control Helps You Write Better Authorization Rules

Aiyedogbon Abraham |
Every application that handles user data eventually hits the same problem: not all users should see the same things. A junior nurse should not be able to access every patient record in the hospital. A... read more

Backend Challenges Teams Face When Processing Repeat Payments

Manish Shivanandhan |
Modern payment systems look simple from the outside. A user clicks a button, enters payment details, and money moves from one account to another. But once payments happen repeatedly rather than once,... read more

How to Preprocess Medical Images for Machine Learning – A Guide Using Chest X-Rays

Lakshmi Mahabaleshwara |
Working with healthcare data introduces preprocessing challenges that go beyond those you might encounter with structured data. Some familiar techniques still apply, while others look very different o... read more

Docker Full Course

Beau Carnes |
We just posted a comprehensive Docker course now live on the freeCodeCamp.org YouTube channel! The ability to scale applications instantly and ship software reliably is an important skill. Containeriz... read more

Key Technical Design Decisions for Building an Educational App with LLMs

Srishti Sethi |
Recently, I spent time prototyping an educational app using Claude Code. The project is an open-source mobile app for educators to share, discover, and facilitate low-cost creative learning activities... read more

What “Production-Ready” Actually Means in Flutter

Gidudu Nicholas |
I've been building Flutter apps for a few years now, and I still remember the first time I shipped something I was genuinely proud of. It had a clean UI, smooth animations, and every flow worked exact... read more

AI Paper Review: Training Language Models to Follow Instructions with Human Feedback (InstructGPT)

Mohammed Fahd Abrah |
GPT-3 was a major breakthrough in natural language processing. With 175 billion parameters, it demonstrated remarkable few-shot learning abilities and showed that scaling large language models could u... read more