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.