Building RESTful APIs with Node.js and Express

Node.js and Express form a powerful duo for backend development.

API Structure

• Routing: Modular routes using Express Router
• Authentication: Using JWT or OAuth2
• Validation: Middleware with Joi or Zod
• Error Handling: Centralized error middleware

Example

app.get('/users/:id', (req, res) => {
  const user = db.findUserById(req.params.id);
  if (!user) return res.status(404).send('Not found');
  res.json(user);
});

Conclusion

Well-structured REST APIs power scalable and maintainable backend systems.