Architectural Patterns
Learn to design and build maintainable software with industry best practices.
Why Architecture Matters
Maintainability
Structures that make updates, bug fixes, and scaling more efficient
Scalability
Design patterns that support growth in users, features, and data
Collaboration
Team-friendly structures that avoid spaghetti code
Core Patterns
Model-View-Controller (MVC)
Segregates data, UI, and business logic for clarity
interface Model { /* ... */ }
class ViewController { /* ... */}
Microservices
Independent services with dedicated domains
// orders-service
const startOrderService = () => { /* ... */ }
Design Principles
SOLID
Single-responsibility, Open/closed, Liskov substitution, Interface segregation, and Dependency inversion.
DRY KISS
Don't repeat yourself. Keep interface simple, stupid!
Real-World Examples
REST API Server
// server.js
const express = require('express');
const router = express.Router();
router.get('/api/data', (req, res) => {
// fetch data from database
res.json({ count: Math.random() * 100 });
});
module.exports = router;
Separate routing, validation, and data logic into distinct layers
Database Layer
class Database {
constructor(config) {
this.connection = createConnection(config);
}
query(sql) {
return this.connection.promise().query(sql);
}
}
Encapsulate database access to maintain clean separation
Pro Tip
Start small and keep expanding. A good architecture evolves with your product needs instead of being fully designed upfront.