Lead Ios Engineer Interview Questions

3,242 lead ios engineer interview questions shared by candidates

Task 1: Debug SwiftUI task management app with UI bugs, memory leaks, and potential crashes while maintaining all functionality Task 2: Fix concurrency implementation using callbacks, Combine, and Swift Concurrency to fetch reminders in parallel Task 3: Find and fix single bug in login screen to progress to next challenge
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IOS Engineer

Interviewed at Speechify

4.3
Dec 22, 2025

Task 1: Debug SwiftUI task management app with UI bugs, memory leaks, and potential crashes while maintaining all functionality Task 2: Fix concurrency implementation using callbacks, Combine, and Swift Concurrency to fetch reminders in parallel Task 3: Find and fix single bug in login screen to progress to next challenge

Online coding assignment: --------------------------------- Find it here: https://imagebin.ca/v/2srEZRO0XbM0 Interview : ----------- Questions were asked from submitted assignment. -- what's the purpose of nonatomic? -- categories vs. extensions -- extending the code to support more functionality -- ARC -- what are other possible @property attributes apart from atomic/nonatomic & strong/weak?
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Software Developer (IOS)

Interviewed at Bloomberg

4
Aug 26, 2016

Online coding assignment: --------------------------------- Find it here: https://imagebin.ca/v/2srEZRO0XbM0 Interview : ----------- Questions were asked from submitted assignment. -- what's the purpose of nonatomic? -- categories vs. extensions -- extending the code to support more functionality -- ARC -- what are other possible @property attributes apart from atomic/nonatomic & strong/weak?

Behavioral: 1. describe a time where you worked with a difficult team member 2. what's something that you're working to improve on 3. describe a time where you had to solve a difficult problem 4. describe a time where you worked on a really challenging task 5. what kind of team do you want to work with 6. what kind of projects do you want to work on?
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IOS Engineer

Interviewed at Zwift

3.2
Dec 22, 2025

Behavioral: 1. describe a time where you worked with a difficult team member 2. what's something that you're working to improve on 3. describe a time where you had to solve a difficult problem 4. describe a time where you worked on a really challenging task 5. what kind of team do you want to work with 6. what kind of projects do you want to work on?

The iOS coding challenge (implement in SwiftUI or UIKit): Create a grid that has over 100 tiles in one screen (No need scrollable) 1. The grid should be arranged so it has 6 columns. 2. The tiles should be square. 3. Randomly select a background color for each tile choosing either white or blue. When tapping ONLY on WHITE tiles, they should turn blue, and at the same time update the background color of every surrounding WHITE tile to blue (ABOVE, BELOW, RIGHT, and LEFT directions ONLY). For every white tile that turns to blue we will continue to update the background of the nearby white cells and so on until there are no cells to update. Making this an updating effect that begins with just one tap.
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Senior IOS Engineer

Interviewed at Tubi

3.9
Dec 11, 2025

The iOS coding challenge (implement in SwiftUI or UIKit): Create a grid that has over 100 tiles in one screen (No need scrollable) 1. The grid should be arranged so it has 6 columns. 2. The tiles should be square. 3. Randomly select a background color for each tile choosing either white or blue. When tapping ONLY on WHITE tiles, they should turn blue, and at the same time update the background color of every surrounding WHITE tile to blue (ABOVE, BELOW, RIGHT, and LEFT directions ONLY). For every white tile that turns to blue we will continue to update the background of the nearby white cells and so on until there are no cells to update. Making this an updating effect that begins with just one tap.

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