freeCodeCamp

You've likely seen this movie before: something breaks in an app you built with an AI coding agent. You ask the agent to fix it. It "fixes" it. But the bug is still there, or a second bug appears. So... read more

Observability isn't a new problem, and NestJS is certainly not the first ecosystem to tackle it. But NestJS Observe is interesting because it asks a more specific question: what happens when observabi... read more

Sending an email doesn't always mean it will reach the recipient's inbox. Sometimes, an email is sent successfully by an application but ends up in the spam folder instead. This can be a real problem... read more

Most security articles read like threat reports. They describe vulnerabilities from the outside looking in: what an attacker does, what the impact is, and how many systems are affected globally. That'... read more

Most JNI crashes don't come from complicated logic. They come from a small set of mistakes around object references: holding on to a reference after it has become invalid, creating references faster t... read more

Four times a year, every sole trader and landlord in Making Tax Digital (MTD) for Income Tax has to send HMRC a summary of their income and expenses. The first deadline of the 2026-27 tax year, 7 Augu... read more

In my previous article, I argued that software automation needs a layer between operational intent and execution. The reason is simple: the specification should describe what success means, and the ex... read more

We just published a comprehensive, free Kotlin course on the freeCodeCamp.org YouTube channel. Whether you're targeting Android development, scalable backend services, or cross-platform applications,... read more

Every website gets feedback, and most of it ends up somewhere awkward. A visitor finds a broken button and emails you. Someone else leaves a comment on social media about a page that won't load on the... read more

Tools like Lovable, Bolt, and v0 feel a bit like magic the first time you use them. Honestly, I was shocked the first time I saw something like that...and you get to do all that from a chat window! It... read more