The iOS Interview Blueprint: Elite Edition (2026)

About the book

Most iOS interview resources give you the correct answer. The correct answer earns a nod and nothing else. What decides a senior round is the question that comes after it: where does that break, why did you choose it, what happens at ten times the traffic.

This book is built around that gap. On every question that decides a senior round, you get the same question answered at three levels.

What you'll learn

• Answer the same question at candidate, senior, and staff depth
• Spot red-flag phrasing interviewers hear every week
• Prepare follow-ups before the interviewer asks them
• Cover concurrency, architecture, SwiftUI, and offline-first data
• Walk a modern live-coding and take-home loop with eyes open

Three answer levels

What most candidates say. Accurate, complete, and worth no extra credit.

What a senior candidate says. The trade-off named, and a rule for choosing.

What a staff engineer says. The systemic consequence: concurrency, migration cost, what it forces on other teams.

Those questions also carry the red flags that quietly weaken an answer, quoted in the words candidates actually use, and the follow-up an interviewer asks next with the short answer in brackets, so the book works as a self-test.

Contents

Nine chapters, ordered by the level at which questions are actually asked: junior, mid-level, senior, senior in transition, tech lead, mobile architect, engineering manager, delivery, and a final chapter on the live round covering live coding method, take-homes, and how AI assistance is treated in a modern loop.

Coverage in depth

Swift concurrency and the Swift 6 migration, memory management and ARC, SwiftUI state and identity, architecture and module boundaries, Swift semantics and dispatch, mobile system design, testing strategy, and offline-first data.

Currency

Every technical claim is checked against Swift 6.2 and the iOS 26 SDK. Where a behaviour depends on an upcoming feature flag rather than being on by default, the book says so rather than stating it flat.

Who it is for

iOS engineers preparing for a real interview loop, from a first junior round to a staff, architect or engineering manager conversation. It assumes you can already build an app.

Who it is not for

Anyone learning iOS from zero, or anyone who wants definitions to memorise.

The author

Mike Salari is a Staff Mobile Engineer and Tech Lead with fifteen years shipping iOS, much of it in fintech. He has conducted more than five hundred technical interviews from the hiring side: screening calls, technical rounds, live coding, system design and debriefs.

Edition

Every future edition is included free. Current revision August 2026.