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
How to Run an LLM Locally on Your Mobile Phone with QVAC and Expo
Djibril-M🍀 |
When I was younger, I remember my mother’s Android phone, a Samsung Galaxy Note 3 that she bought right after losing her BlackBerry. During that time, a phone with 16 GB of storage was considered cutt... read more
How to Understand the Safe Integer Limit in JavaScript
Ayodele Aransiola |
According to the Stack overflow technology survey in 2025, JavaScript is one of the most widely used programming languages in the world. We use it to build frontend applications, backend services, pay... read more
How to Deploy a Spring Boot App with MySQL on Amazon EKS
Chisom Uma |
If you've been looking to deploy your Spring Boot app to the cloud but feel a little overwhelmed by all the moving pieces, don't worry, you're not alone. Kubernetes can seem intimidating at first, but... read more