Do you have to independently design integrations or is it done jointly with a developer/architect? What kind of integrations: internal or external?

Integration design usually occurs in collaboration with developers and architects, especially if the integration is complex or critical to the system. The analyst formulates requirements and describes business logic, while architects and developers help determine technical details and implementation possibilities.

Integrations can be internal (between modules or services within a single system) or external (with other systems, services, or APIs). The choice depends on the task and the architecture of the project.