Learn Domain-Driven Design by building a real e-commerce API with NestJS and TypeScript. Starting from shared building blocks like Entities, Value Objects, and Aggregates, you’ll layer on Ports & Adapters, CQRS with command and query buses, repository abstractions, and cross-context orchestration with Domain Events and Sagas.

All structured through a clean hexagonal architecture where every dependency is swappable and every bounded context is autonomous.