Jetpack compose

I need an android jetpack compose developer
I have my main app containing 1 screen and linked to room db, this screen is showing products(crud)
I want to add 2nd screen, it hold products, i want to make like point of sales ,when user click on item, the item add to the cart, and so on, after pressing checkout button, the app save to DB a delivery operation

1-Delivery table( id,time,client,listOfItems)
2- Item table(id, productid, sellingPrice, buyingPrice, soldQuantity)
3-Client table(name, email,..etc)
4-product table(name, price, image...) (already exist)
6-the screen already exists, I need only the backend


Note:
.Price is not negotiable.
.I need a developer familiar with kotlin jetpack compose
.I need a developer who doesn't waste my time