Define the technical environment
Framework or platform.
Browser support.
Responsive requirements.
Existing design system.
API dependencies.
Accessibility expectations.
Performance expectations.
Repository and deployment workflow.
Review working interfaces
Screenshots alone do not prove implementation quality. Ask about responsive behavior, maintainability and technical constraints.
Clarify design responsibility
Determine whether the developer receives finished designs or is expected to make significant visual and UX decisions.
Front-end quality lives in behavior as much as appearance.The interface has to work across real devices and states, not just match a static screenshot.
Define handoff
Source code, repository access, build instructions and deployment expectations should be clear.