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Seniority and process
Senior iOS interview questions
Senior iOS interviews test depth and judgment, not trivia. This overview maps the areas that recur and the signals interviewers reward, and links the deep dives.
The topics that come up most
Expect Swift concurrency, SwiftUI and UIKit trade-offs, memory management, architecture such as MVVM and unidirectional state, networking and caching, and testing. Most senior loops add a mobile system design round and a behavioral round. Questions are open-ended, asking you to design, refactor, or debug and then following up on your choices.
What separates a senior answer
Specificity is the strongest signal: the more precisely you explain why something behaves as it does and what you would trade off, the more credible you are. Tie answers to production experience, a real incident, a migration you led, or a decision you would now make differently. Vague confidence reads as junior.
Go deeper than a summary
Share Your Screen works topics like this through in full: 75 solved Swift problems with tests, 9 real case studies, and 7 annotated mock interviews, so you rehearse the live round instead of just reading about it.
Frequently asked
How many rounds is a senior iOS interview?
Typically four to five: Swift technical, live coding, mobile system design, and behavioral, sometimes with a take-home.
What is the biggest senior signal?
Precise reasoning about trade-offs, backed by real production experience, rather than reciting definitions.