MobileTable-stakesAround since 2014
Swift
Apple's programming language for building iOS, macOS, and other Apple-platform apps — the modern standard, having largely replaced the older Objective-C.
Think of it like
Like the current-model tool from Apple's own toolkit, replacing an older tool (Objective-C) most new work has moved on from.
Junior or senior?
Junior sounds like
Has only worked in a pure Swift codebase.
Senior sounds like
Has worked in a codebase that mixed Swift with older Objective-C, and can describe what that was like.
Ask them
“Have you worked in a codebase that mixed Swift with older Objective-C code? What was that like?”