15 iOS Interview Questions for Hiring iOS Engineers in 2025

Even though Android’s market share is still leading in the global arena (this mobile OS holds 71%), iOS development services are on-demand in 2024. According to the Statista report, the number of app releases for the Apple iPhone operational system is over 35,000 monthly this year. 

It is expected that these statistics will be ever-growing in 2025 due to high users’ requests for trendy applications powered by AI, smart homekit options, blockchain, VR, iBeacon, etc. iPhone pocket screens are more adaptable to digital innovations in comparison with gadgets with Android OS. 

If you are searching for a skillful iOS app developer for hire, it is better to explore the relevant talent pools, destinations with competent offshore technicians, and types of apps that hold the biggest share, etc. 

Finally, you will be able to interview the best-matching candidates and complete your employment process successfully. But first, prepare for your introductory stage to hire an iOS programmer your project and team really need.

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Where to Start? Your Best Intro to Hire Remote iOS Developers

Before making a list of interview questions for candidates, take a closer look at trends, the best destinations with talented mobile app developers, and the most popular types of iOS applications users are searching in the Apple Store or other marketplaces. These analytical insights will help you plan your project properly and initiate a result-driven search for experienced technicians.

According to the Statista report for the last quarter of 2024, the most popular iOS apps are games, business-related, and utilities. Education, lifestyle, and shopping applications are also on-demand in 2024. The same list of top iOS apps is expected in 2025. 

If you are searching for skillful programmers who can deliver high-quality digital products for iPhone devices, it is reasonable to check all the networking channels first. Hire iOS developers on tech forums, job websites, and freelance platforms. But remember about alternative talent pools to hit. 

For example, Wild.Codes can meet all your recruitment requirements and speed up the search for technicians at your request via AI-vetted and expert-verified portfolios of competent devs. Additionally, try social media employment strategies while surfing LinkedIn, X, and GitHub.

Speaking about the best destinations where you can find offshore mobile app devs, there are six countries with a sound number of programmers who make a specialty out of iOS & Android development:

• Poland;
• Ukraine;
• China;
• Argentina;
• Romania;
• India;
• The Philippines.

Each region is notable for its culture fit, tech stack, and programming style. Let’s check the main reasons to hire iOs app developers in these or those countries from the top list:

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To summarize, iOS app developers for hire from China, the Philippines, or Argentina can meet your technical requirements but fail some organizational moments because of different time zones. IT specialists from Eastern Europe will come in handy to solve almost any tasks related to mobile app development at reasonable hourly rates. Indian programmers are also in favor due to low costs for programming services and a high-level quality-price ratio. 

When you have already picked sides with the destinations, programming languages, technical tasks, and other demands of your ideal iOS developer for hire, let’s explore the best questions to have an extremely informative interview and find your perfect match.

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Hire Remote iOS Developers Hassle-Free: 15 Questions for Your Interview with Candidates

We recommend starting with conversational and warm-up questions with some psychological background. Ask your interviewee about his/her hobbies, favorite colors, things that inspire, etc. Make your dialog maximally friendly to exclude stress and any form of constraint. To check the tech skills of your potential iOS developer, use these questions:

1. Name all the main architectural patterns in iOS development.
2. Explain the iOS lifecycle. Describe it briefly.
3. Compare frame and bounds in iOS.
4. What are the differences between UITableView and UICollectionView?
5. When do you use the @IBOutlet reference and the @IBAction method?
6. Name SWIFT optionals and closure.
7. Which is your favorite design pattern in iOS? Why?
8. Compare synchronous and asynchronous tasks in iOS.
9. Describe memory & retain cycles in iOS.
10. What is NotofocationCenter? When do you use this method?
11. Describe persistent iOS-driven solutions you have already used. What was your best experience?
12. Have you recently used UI Testing and Unit Testing in iOS? Which insights can you share based on this experience?
13. What is your algorithm for using Dependency Injection in iOS?
14. Which way do you usually implement animations in UITableView?
15. What will your actions be if the memory leak is verified?

Remember that you can use similar questions for thought-provoking dialog or try your interviewee to ask about these or those scenarios. Let him/her describe the strategy that will be the ebay-matching for various situations during iOS development processes. 

We hope that such an interview will bring you a detailed explanation and 100% acknowledgment of your potential dev’s skills and expertise. We wish you find your perfect match. Reach new heights with your star team and the new IT specialists you will hire for your successful project!