DEX Wanted based on XRP

hi
i look for a professional team which be able to make a dex wallet and exchange based on XRP ( Ripple )
first please read my wants , then give price
i will ignore all automatic msgs

i need the exchange be like sologenic.org
if you can make it like that , which connects to XUMM wallet and exchange based XRP
we can have a deal for the right price
i need both front end and backend

tell me estimated time + price
regards