iOS Mobile App Development

I'm looking for a developer with strong iOS development experience to design and build a mobile application for me.

Skills and experience required:
- Proficient in Swift and/or Objective-C
- Strong understanding of iOS design principles and interface guidelines
- Experience with mobile app development tools (Xcode, Interface Builder, etc)
- Knowledge of Apple’s design principles and interface guidelines
- Ability to work with APIs and third-party libraries
- Experience with unit testing and debugging

Please provide a portfolio of your previous iOS applications.