API design is one of the most in-demand skills in web development — and most developers learn it backwards. They write endpoints first and figure out the structure later, ending up with something that works but drives everyone who touches it insane. Here's a story that might sound familiar. A backend developer at a mid-sized fintech startup built out their payments API over six months. It worked. It processed transactions. Users got their confirmations. But when the iOS team came to integrate it, they spent three weeks just figuring out the error codes. Some returned numbers. Some returned strings. One returned an object with a different structure depending on whether the server was under load. Nobody could find documentation because there wasn't any. The frontend team built workarounds. The mobile team built different workarounds. Now the codebase has workarounds for the workarounds, and every new engineer who joins asks the same questions on their first day. That's no...
The Definitive Guide Of Programming & Technology