Backend

Databases, APIs, Cloud Code, and the managed Parse platform.

• Why Does the API Return 101, 119, 142 or 209? Every Backend Error Code, Reproduced [Full Repo]

  error-guide

  Every error code a backend API returns, reproduced with curl: 101, 119, 141, 142, 202, 203, 206, 209 and more, with HTTP status, cause and fix. Sept 2026.

• Build and Deploy a Node.js REST API in 15 Minutes — Without Owning a Server [Full Code Inside]

  tutorial

  The same Task API two ways: 105 lines of Express you maintain forever, or 24 lines on Back4app. Measured comparison, every command tested August 2026.

• How to Add Authentication to a Web or Flutter App Without Writing an Auth Server [Full Repo]

  tutorial

  Add signup, login, logout and password reset to a web or Flutter app with six REST calls to a managed backend and no auth server. Signup 597 ms, login 245 ms.

• Your Frontend Talks Straight to the Database. Here Is How to Lock It Down [Full Repo]

  tutorial

  Twelve requests from four identities against one class, before and after class-level permissions, an owner ACL from a hook and a role. Measured Sept 2026.