Grocery delivery app like instacart - If you can make it only bid then $250 - $750 USD

Grocery delivery app like instacart - If you can make it only bid then $250 - $750 USD Hi I want to make app like instacart which offers grocery delivery. I want my devleoper to make me that from start to end including back end where I can make changes etc. Many thanks Skills: Android | iPhone | Mobile App Development | Objective C | PHP