Preparing for a technical iOS job interview

About the book

Having been a freelance iOS developer for over a decade, Natascha Fadeeva has sat on both sides of the table — interviewing for projects, and leading the technical interviews herself.

This book is a guide for the technical iOS questions you might be asked. The questions aren't meant to be memorized or used as a checklist of must-know topics. Think of them as guiding stars: reflect on your knowledge, spark curiosity, and uncover areas you may want to explore more deeply.

Some questions will feel immediately relevant. Others dip into edge cases or advanced areas. Not every role requires mastery of every topic — but skimming through questions like these can warm up your technical thinking and help you walk into the conversation with more confidence.

What you'll learn

• Answer 300+ real interview questions across the whole iOS stack
• Self-test with each chapter's questions overview before reading answers
• Cover Swift and Objective-C, SwiftUI and UIKit, and Combine
• Talk through networking, persistence, security, and accessibility
• Explain Swift concurrency with async/await, testing, and dependency management
• Handle newer topics interviewers reach for: AI & machine learning, SwiftData, and more

How it is structured

Each chapter starts with a questions overview so you can check your knowledge without seeing the answers. All questions are numbered so you can quickly find the answer when needed.

About the author

Natascha Fadeeva is a senior freelance iOS developer based in Leipzig, Germany, freelancing since 2012 and writing weekly about Swift and iOS on tanaschita.com. The question list comes from years of hiring interviews for projects and leading technical interviews herself.