Uploaded July 2023 | Updated September 2026, 53 minutes ago

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I put together a collection of my best iOS Developer job interview topic videos to help you prepare for your interview. It's impossible to know what questions will be asked during an interview, but these topics are VERY commonly asked about:

Topics covered:
- Network Calls
- Classes vs. Structs
- Generics
- Closures
- Filter, Map, Reduce
- Array vs. Set
- Unwrapping Optionals
- Unit Tests
- Singletons
- Dependency Injection
- Delegates & Protocols (UIKit)
- View Lifecycle (UIKit)
- Concurrency & Threading
- ARC & Retain Cycles (UIKit)

Need help with something specific? Book a call with me:
seanallen.teachable.com/p/call?video=XTAziR-tY-A

My iOS Dev Courses:
seanallen.teachable.com/?video=XTAziR-tY-A

Twitter:
Sean Allen - twitter.com/seanallen_dev

Hired.com:
hired.com/x/1n01g

Book and learning recommendations that help out the channel if you decide to purchase (Affiliate Links):

Paul Hudson's Hacking With Swift:
gumroad.com/a/762098803

Donny Wals - Combine:
gumroad.com/a/909014131

Mark Moeyken’s SwiftUI Books:
bigmountainstudio.com/swiftui-views-book/fzc51

Objc.io Books (Thinking in SwiftUI & Advanced Swift):
gumroad.com/a/656585843

Timestamps:
0:00 - Network Calls
24:56 - Classes vs. Structs
31:22 - Generics
41:01 - Closures
54:31 - Filter, Map, Reduce
1:07:15 - Array vs. Set
1:15:57 - Unwrapping Optionals
1:29:18 - Unit Tests
1:45:56 - Singletons
1:50:56 - Dependency Injection
1:56:56 - Delegates & Protocols (UIKit)
2:06:47 - View Lifecycle (UIKit)
2:13:49 - Concurrency & Threading
2:21:12 - ARC & Retain Cycles (UIKit)

#swift #softwaredeveloper #iosdeveloper