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Layered (N-tier) Architecture

By Habib Pourfard

Layered architecture is like organising your work into separate teams—each layer handles one responsibility and communicates only with its neighbours. This separation brings clarity, making code easier to manage and update, but sometimes it adds extra steps and can slow things down.

Picture a restaurant. The kitchen prepares the food, the waiters serve it, and the cashier handles payments. Each group does its part, passing tasks from one layer to the next, and if you need to change the menu, you don't have to retrain the cashier.

  • Presentation Layer: Handles user input/output
  • Business Layer: Manages business logic
  • Data Layer: Deals with storage and retrieval
A restaurant kitchen, waiters, and cashier, each working as a distinct team
Layered architecture keeps responsibilities separated, like teams in a restaurant, so each part can specialise and improve independently.
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