Software design and architecture

Give code a shape that survives growth: design principles, SOLID and design patterns solving real problems, layered and clean architecture, architecture styles, and a small framework you build yourself so no framework is magic.

2 lessons
75 min to read and try
Before this: TypeScript, Backend engineering

0 of 2 lessons done

Start lesson 1 →

When you finish, you can

Spot high coupling and low cohesion, and refactor it
Apply SOLID, DRY, KISS and YAGNI with judgement
Use factory, builder, adapter, decorator, proxy, strategy, observer, command and chain of responsibility where they solve a problem
Structure a backend in layers with ports and adapters
Compare monoliths, modular monoliths, microservices and event-driven systems
Build and explain the parts of a backend framework

You build: A miniature TypeScript framework with a container, router, middleware and validation

MODULE 1

Architecture

1Backend architectureGive backend code a shape. Learn controllers, services, repositories, models and DTOs, middleware, dependency injection and configuration, the difference between domain, application and infrastructure code, and which way dependencies must point. Then refactor the BookStore's orders into those layers.45 min

MODULE 2

Framework engineering

2What a framework doesThe difference between a library and a framework, inversion of control, and the jobs a backend framework takes over: lifecycle, dependency injection, routing, configuration, validation, database access, testing and application structure. Build a tiny framework to see how it works inside.30 min

Course checkpoint

Prove you can move on. The checkpoint picks 10 questions at random from every lesson in this course. Get 8 right to pass. Your result is saved in this browser only.