INFRASTRUCTURE / BACKEND
The interface is only the beginning
What users see depends on APIs, business logic, data, security and infrastructure that continue working long after the screen has rendered.
Design beneath the screen
A production interface is the visible edge of a larger system. Reliable APIs, clear business rules, durable data models, security boundaries and deployment infrastructure determine whether that interface can actually support the operation.
Make failure part of the design
Retries, validation, permissions, backups, logs and recovery paths should be considered architecture, not cleanup work after the interface is finished.
