Have you had experience working on projects divided into multiple modules?

Yes, modular structure is often used in Flutter projects to improve scalability and code maintenance. For example, an application can be divided into modules: UI, business logic, network operations, and data models. Each module is implemented as a separate Dart package or folder with clearly defined interfaces. This facilitates testing and code reuse.

Example structure:

/lib
  /ui
  /models
  /services
  /utils

This approach helps to divide responsibilities and simplifies team collaboration.