Bluetooth EKG Plotter Development

I'm seeking an experienced developer to create a mobile application that communicates with a medical device over Bluetooth. The app should be able to send commands to the device, retrieve heart rate, full EKG data, and device status, and plot the EKG using the retrieved data.

Key requirements:
- Support for both iOS and Android
- Ability to manage the medical device and send data to a portal
- Provision for API integration
- Preview EKG in real-time

Ideal skills and experience:
- Proficiency in mobile app development for both iOS and Android
- Experience with Bluetooth communication and medical device integration
- Strong background in data visualization, particularly in plotting EKG graphs
- Knowledge of API development and integration

Please provide a portfolio showcasing relevant experience.