Different interfaces, shared records
A storefront highlights products. A portal highlights customer relationships. An internal tool highlights operations. These experiences can connect to the same business records without presenting them in the same way.
Give each layer a clear job
The frontend owns presentation and interaction. The platform provides supported content and business capabilities. Extensions can add project-specific behavior around that foundation.
Make context explicit
A person may belong to more than one customer. The application should show the active context and carry it into the relevant requests, instead of assuming sign-in alone determines the business being used.
Design the unhappy path
A denied action or failed external delivery should have an understandable state. Traceability helps connect the visible result to the decisions and operations behind it.