Battery Management PCB & Firmware

I am developing Eye Massager. I have China Based Eye Massager for Reference and duplicate functions from it.

I want to design PCB for same function in smallest PCB board or using Raspberry pi or any open source board.

There are three main function:
- Pressure (Controlled by Pressure or Diaphragm Valve and Solenoid Valves)
- Heating (Controlled by Heating Pads)
- Vibration (Small Vibration Pads)
- Sound using bluetooth connectivity

Required programming for User control buttons as well.

Then I want to control those functions using Mobile Application.

Deliverable:
- Programmed and Tested PCB Board along with all Components as one package
- All Original Source, Data, Programs etc

I will supply Plastic Enclosure to mount all items inside it.

Looking from someone based in Ahmedabad, Gujarat.