A project that can automatically login amazon account and place orders

I have my own codes that can retrieve product information from [login to view URL] and generate purchase link. The purchase link is nothing but a login page with the shopping cart content. The next step I need is to have some codes that can automatically place the order. I am willing to pay money to buy someone who can write the codes for me. This code doesn't need to be any fancy. I just need to basically work flow done. find product -> add to cart -> checkout "Find product" and "add to cart" are already done and will be provided to you, written by JAVA I also want the checkout step written by JAVA.