Location-Based Action App Development

I need a skilled developer to create a location-based mobile app for iOS and Android. The app should perform specific actions (to be defined), send notifications, log data, and provide directions.

Key requirements:
- Simple, clean user interface
- Location-based functionalities
- Action performance (details to be provided)

Ideal skills:
- Mobile app development (iOS & Android)
- UI/UX design for simplicity
- Experience with location services and notifications
- Strong background in app interaction design

Please provide a portfolio with relevant experience.