Raspberry Pi / Android Firmware Development

PLEASE NOTE: WE ARE NOT LOOKING FOR A MOBILE APP DEVELOPER. We are looking for a freelancer with hands-on experience RaspberryPi & android development. Android app will be installed in RaspberryPi. The user will control the system through the 7-inch capacitive touch screen connected to the RaspberryPi (Android App will be displayed in the 7 Inch touch screen). Buttons in APP to rotate the 3 servo motors individually - ROTATE LEFT / ROTATE RIGHT / STOP (3 Servo Motors with 230 volts AC drivers). Servo drivers have MODBUS support. Buttons in APP to rotate the 6 stepper motors individually - ROTATE LEFT / ROTATE RIGHT / STOP (6 Stepper Motors with 24 volts DC drivers). Stepper drivers have MODBUS support. Colour Sensor: Colour screen to select the color which sensor should detect (RGBW). If the user selects RED and when the sensor detects RED color, a message "OBJECT DETECTED" will be displayed in touch screen. Motion Sensor: When the user clicks on the Motion Sensor button. if any motion detected by the sensor will be messaged in touch screen "MOTION DETECTED" and the message will go after 3 seconds. We also need to have our company logo animation to be made as the boot animation. The look and feel of the touch screen are very important for our project. We are looking for similar effects in the touch screen as given in the video below: (Check from 2:40 to 3:20) [login to view URL] We are open to any suggestion, and the best suggestion would be considered.