Android App for Motor Control & Card Processing

I'm looking for a proficient Android app developer to create an application capable of controlling over five motors. The motors will be performing both rotational and linear movements. The app will also need to integrate with a credit/debit card processing machine.

Key Requirements:
- Design and implement an Android app for motor control
- Ensure compatibility with over five motors
- Program the app for both rotational and linear movements
- Seamless integration with a card processing machine
- Focus on user-friendly interface and experience

Ideal Skills:
- Extensive experience in Android app development
- Previous work with motor control apps
- Knowledge in card processing machine integration
- Strong programming skills for custom sequences
- Ability to create intuitive and accessible user interfaces