Create an app for selling items on my site

My site is called [login to view URL] I am looking for someone who can build me an app that will allow me to add items for sale under a certain user without having them to have to log in. 1. The person from NEW YORK City takes an android phone opens the app 2. Chooses the category for the item 3. Enters in the information regarding the item 4. Takes pictures of the item 5. My database then adds the item as a pending item under NEW YORK city. 6, The person who is in charge of new york city will then go through the items and approve each one and also price each one 7. Once it is approved it goes live onto my page. 8. They must have their own portal to login to approve and delete the items no longer their 9. The items must be able to be exported and imported into my system with all information by csv file spreed sheet. 10. The system must create a bar code for the item that can be printed out on normal paper. The bar code must be scannable. 11. Once the item bar code is scanned the item must be placed on a list that will then remove the item from the website.