How to Use NestJS Observe: An Observability Handbook for Devs
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 Fuente: Artículo original
How to Break the AI Coding Agent Fix Loop
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 Fuente: Artículo original
API Authentication & Authorization: An Engineering Deep Dive into Mechanisms, Trade-offs, and Failure Modes
Every API has some form of authentication. But having authentication and getting it right are two completely different things. I’ve reviewed production systems where JWTs had no expiry. Systems where Fuente: Artículo original
How to Build Your Own AI App Builder Like Lovable with Next.js, AWS and Sandboxes
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 Fuente: Artículo original
How to Build an AI Support System That Automatically Routes Bugs to GitHub with Next.js and Jev
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 Fuente: Artículo original
Learn Modern Kotlin
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, Fuente: Artículo original
How to Debug a Stuck Kubernetes Rollout with a Hands-On Lab
You update a Deployment, run kubectl rollout status, and wait. The command times out. But when you send a request to the Service, it still answers. So did the update finish? And if it didn’t, which Po Fuente: Artículo original
How to Stop Your Android App from Draining the Battery with Wake Locks
A wake lock is one of the simplest APIs in Android and one of the easiest to misuse. Acquiring one takes a single line of code. Forgetting to release it can keep a phone’s CPU awake for hours, drain t Fuente: Artículo original
Build and Publish a Full-Stack Mobile App with AI
Building a production-ready mobile application used to require a dedicated team of frontend, backend, and DevOps engineers. With modern AI tools, an individual developer can take an idea from concept Fuente: Artículo original
How to Use the Fullscreen API in JavaScript (and Keep the Screen Awake with the Wake Lock API)
Sooner or later, most front-end developers hit the same request: “Can this take up the whole screen?” A slide deck, a video player, kiosk dashboard, game, drawing canvas, or timer on a classroom proje Fuente: Artículo original