Backend Core Skill

Instructions

1. Routing

   • Create RESTful routes (GET, POST, PUT, DELETE)
   • Organize routes by feature/module
   • Use clear and meaningful endpoint names

2. Request & Response Handling

   • Validate incoming request data
   • Handle headers, params, body, and query
   • Send proper HTTP status codes and JSON responses

3. Database Connection

   • Connect to databases (MongoDB, PostgreSQL, MySQL)
   • Use ORM/ODM when needed
   • Handle connection errors safely

4. Business Logic

   • Separate logic from routes (controllers/services)
   • Keep code clean and reusable
   • Handle async operations properly

Best Practices

• Follow MVC or service-based architecture
• Always validate and sanitize user input
• Use environment variables for secrets
• Handle errors with try/catch or middleware
• Keep APIs consistent and predictable

Example Structure

// routes/user.routes.js
import express from "express";
import { createUser, getUsers } from "../controllers/user.controller.js";

const router = express.Router();

router.post("/users", createUser);
router.get("/users", getUsers);

export default router;