Use this list of iOS Engineer interview questions and answers to gain better insight into your candidates, and make better hiring decisions.
When interviewing for an iOS Engineer position, it's crucial to assess the candidate's technical skills, problem-solving abilities, and familiarity with iOS development tools and frameworks. Additionally, understanding their experience with app lifecycle management, user interface design, and performance optimization is key.
Check out the iOS Engineer job description template
To gauge the candidate's attention to detail and design sensibility.
Sample answer
I focus on creating intuitive and visually appealing interfaces by following Apple's Human Interface Guidelines and conducting user testing to gather feedback.
To understand the candidate's familiarity with essential development tools.
Sample answer
I frequently use Xcode's built-in debugger, Instruments for performance tuning, and third-party tools like Charles Proxy for network debugging.
To assess the candidate's knowledge of app lifecycle management.
Sample answer
I use the AppDelegate methods to manage state transitions and ensure that the app behaves correctly when moving between active, inactive, and background states.
To evaluate the candidate's ability to enhance app performance.
Sample answer
I focus on efficient memory management, minimizing network calls, and using background threads for heavy tasks to keep the UI responsive.
To understand the candidate's approach to writing clean and maintainable code.
Sample answer
I follow best practices like MVC/MVVM architecture, write unit tests, and use code reviews to maintain high code quality.
To assess the candidate's experience with dependency management tools.
Sample answer
I use CocoaPods or Carthage to manage dependencies, ensuring that all libraries are up-to-date and compatible with the project.
To gauge the candidate's experience with version control systems.
Sample answer
I use Git for version control, following a branching strategy like Git Flow to manage feature development, bug fixes, and releases.
To understand the candidate's approach to networking and data handling.
Sample answer
I use URLSession for network requests and Codable for parsing JSON data, ensuring that all network operations are performed asynchronously.
To evaluate the candidate's problem-solving skills and resilience.
Sample answer
I once faced a memory leak issue that was causing the app to crash. I used Instruments to identify the source and refactored the code to properly manage memory.
To assess the candidate's experience with app analytics and user engagement strategies.
Sample answer
I integrate analytics tools like Firebase to track user behavior and use A/B testing to experiment with different features and improve user engagement.
Look out for these red flags when interviewing candidates for this role:
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