Write some Software

hi i need a person to write me a code for a pic chip i will try to explain the best way can the code if for a gaming controller ( xbox one let us say ) so i have installed 2 buttons on the back of the controller and the 2 buttons need to be connected to all the 8 buttons on the front of the controller so what the chip does is act as a switch ussually this chips function like this : you have another rear button to make the chip enter the remapp mode once pressed an led turns o to let me know that after that i select the button want mapped ( let us say Y ) to the left or right rear button as soon as the remapp is done the led will turn off something like that i hope you will understand what i want also you will need to let me know the type of chip i need to use and how the connect the wires ( a diagram ) thank you