Cross-Platform Mobile App Development

I'm looking for an experienced mobile app developer to create an app for both iOS and Android platforms.

Requirements:
- Comprehensive and detailed project proposals
- Experience in both iOS and Android development
- Strong portfolio showcasing past mobile app projects
- Knowledge of UI/UX design principles
- Ability to integrate APIs and third-party services
- Experience with backend development is a plus
- Excellent communication skills for regular updates

Please include your past work and experience in your application.