Objective-C
Objective-C is one of the main programming languages used to create apps for Apple devices like iPhones and iPads. While newer apps often use Swift (Apple's newer language), many existing apps still use Objective-C, and many companies need developers who can work with both. Think of it as an older but still important language in the Apple development world, similar to how some cars still use tried-and-true engine designs alongside newer technologies. Companies often look for Objective-C skills when they need to maintain or update existing iOS apps, or when working with older Apple systems.
Examples in Resumes
Maintained and updated legacy Objective-C applications for major retail client
Converted Objective-C codebase to Swift while maintaining app functionality
Led development team working with both Objective-C and Swift for iOS applications
Typical job title: "iOS Developers"
Also try searching for:
Where to Find iOS Developers
Online Communities
Job Boards
Professional Networks
Example Interview Questions
Senior Level Questions
Q: How would you approach modernizing a large Objective-C application?
Expected Answer: A senior developer should discuss strategies for gradually converting code to Swift, maintaining compatibility between both languages, and ensuring the app's stability during the transition process.
Q: Explain your experience with memory management in Objective-C applications.
Expected Answer: Should demonstrate understanding of how to prevent memory leaks, proper resource management, and best practices for maintaining app performance.
Mid Level Questions
Q: How do you handle data storage in an Objective-C iOS app?
Expected Answer: Should explain different ways to save information in apps, like using databases, files, or cloud storage, and when to use each method.
Q: Describe how you would integrate third-party services into an Objective-C app.
Expected Answer: Should discuss experience with adding external features like payment processing, social media sharing, or analytics to apps.
Junior Level Questions
Q: What's the difference between Objective-C and Swift?
Expected Answer: Should be able to explain basic differences between the two Apple programming languages and why both are still used today.
Q: How do you create a basic user interface in Objective-C?
Expected Answer: Should demonstrate knowledge of creating simple screens and handling basic user interactions in iOS apps.
Experience Level Indicators
Junior (0-2 years)
- Basic iOS app development
- Simple user interface creation
- Understanding of Apple design guidelines
- Basic app debugging skills
Mid (2-5 years)
- Complex app feature development
- Integration with web services
- App performance optimization
- Working with both Objective-C and Swift
Senior (5+ years)
- Large-scale app architecture
- Legacy code maintenance and modernization
- Team leadership and code review
- Advanced debugging and optimization
Red Flags to Watch For
- No experience with Apple's development tools
- No knowledge of iOS platform guidelines
- Unable to explain basic app development concepts
- No understanding of mobile app security practices
