Robust Network Layer in Swift via Clean Architecture Approach

Networking is the backbone of almost every modern iOS application. However, as projects grow in complexity, the network layer often becomes a “junk drawer” for URL construction, messy completion handlers, and scattered error logic. This tight coupling makes unit testing difficult and maintenance a nightmare. In this article, we are going to build a reusable, testable, and type-safe Network Layer from scratch. By leveraging Clean Architecture principles, the power of Swift Generics , and the modern elegance of Async/Await , we will create a solution that separates concerns and scales with your app.