Bluetooth Low Energy in Flutter: A Handbook for Devs
Nikheel Vishwas Savant |
Most Flutter tutorials stop at network calls and REST APIs. The moment you need to talk to a physical device, a heart rate monitor, a smart bulb, a fitness tracker, an industrial sensor, or your own c... read more
How to Fix the Dual-Write Problem in Node.js with the Outbox Pattern
Gabor Koos |
Imagine you're building an e-commerce platform where placing an order needs to trigger several things at once: the warehouse has to be told to prepare the shipment, the email service has to send a con... read more
Claude Code Full Course
Beau Carnes |
We just published a brand new course on the freeCodeCamp.org YouTube channel that will take you from an absolute beginner to a Claude Code master. Whether you want to automate your development workflo... read more
How GPS Works in Wearables (and Why It Kills Your Battery)
Shradha Puri |
A couple of months ago, I went for a 10K run with three different devices on me. Why? Another long story of review deadlines and my own procrastination. By the time I was done with my run and got back... read more
What Modern QA Engineers Actually Do: It's More Than Finding Bugs
GAYATHRI BOLINENI |
Ask someone what a QA engineer does, and you'll probably hear a familiar answer: "They test software and find bugs." It's a common perception, and to be fair, finding bugs is an important part of the... read more
How to Implement HIPAA Technical Safeguards on AWS [Full Handbook]
Ayobami Adejumo |
Before I had ever heard the term "HIPAA audit", I spent three days helping a healthcare SaaS startup fix a single misconfigured S3 bucket. Not a breach — nothing was accessed. But the bucket was publi... read more
How to Implement Privacy by Design in Modern APIs – A Developer's Practical Guide
samiatakande |
As software developers, we're usually taught to prioritize features like speed, performance, and uptime. When we build APIs, our core concern is making sure data gets from Point A to Point B smoothly.... read more
Why Your Quantum Circuit Works in a Simulator but Fails on Real Hardware [Full Handbook]
Casmir Onyekani |
If the exact same quantum circuit works perfectly in a simulator, why does it often produce different results on a real quantum computer? That question catches almost every quantum developer by surpri... read more
How to Build an Open Source SaaS Landing Page Template with shadcn/ui
Ash |
Most SaaS landing pages share the same core sections: a hero, social proof, features, pricing, FAQ, and a footer. And most developers end up building these from scratch on every project. That's repeti... read more
What Happens During a Production Deployment? A Behind-the-Scenes Guide
Manish Shivanandhan |
You push your code. A few minutes later, it is live for real users. Between those two moments runs a long chain of machinery: builds, artefacts, migrations, health checks, traffic shifts. Every produc... read more