MobileLegacyAround since 2008
UIKit
Apple's older, more manual framework for building iOS user interfaces, where a developer imperatively places and updates each screen element — predates SwiftUI and still runs a huge share of existing iOS apps.
Think of it like
Like manually wiring and placing every fixture in a room yourself, versus SwiftUI's approach of just describing the finished room you want.
Junior or senior?
Junior sounds like
Assumes deep UIKit experience means being behind.
Senior sounds like
Can describe whether their UIKit work was maintaining an existing app, or building new screens recently.
Ask them
“Is your UIKit experience maintaining an existing app, or have you also built new UIKit screens recently?”