Raspberry Pi LCD Touch Screen Relay Controller

I'm looking for an expert in Raspberry Pi programming to develop a controller program for an LCD touch screen relay system.
This is for a low-cost aftermarket prototype to control aftermarket automotive accessories focused on first responders POV vehicles but could be applied to larger markets.

NOTE: This project is still in Progres and is not complete and not tested, specs, hardware configuration, are subject to change. designs and ideas are confidential by continuing reading you agree to keep this project and associated ideas confidential.

Key Features:
-FAST boot up for emergency responders
-The system is to control lights, sirens, and other aftermarket accessories.
- The relay controller should be able to control relay switches and take user input from a touch screen.
- The user interface on the touch screen needs to be a combination of both graphical interface with icons and a text-based menu.
- The system needs to control up to 48 relays using GPIO pins off a Raspberry Pi, with the help of a MCP23017.

Ideal Skills:
- Extensive experience with Raspberry Pi and relay controller programming or microcontrollers.
- Proven ability to create user-friendly, interactive touch screen interfaces.
- Experience working with MCP23017 and GPIO pins.
- Strong understanding of both graphical and text-based interface design.

More project details and ideas:
- hardware preference would be a 5" or 7" resistive touch screen user interface.
-four graphic screens with different relay options on each and a fifth settings screen.
-lower right corner of each screen would have a graphic of the vehicle and status of accessories (like when the light bar is on the light bar would be highlighted).
-right side of screen would have brightness up & down buttons, and possibly a day/night mode or color change button.
-looking for a fast boot up so building a custom OS gui or changing hardware to microcontrollers are on the table.
-optional small button graphic animation would be nice.