Woocommerce/Wordpress PHP Back-end functions

Hello, We are two front-end developer in e-commerce. Now we create our own e-commerce besides work. Since knowledge is lacking in the backend, We ready for the right price to hire a company that can solve the function. The function we need help with is to create a personalized poster, using fields. Same type of service function as a ”custom t-shirt store”. When the customer has entered the desired data and puts the product in the cart, the poster will be displayed. Also if the customer wants to make changes. To get an accurate understanding of what we want you to build, see the link of competitors function. [login to view URL] And also how it will appear in the cart-page view. This function is the first thing we need to get help with. The second part to fix, When customer placed orders, we need to send an automail with the customer's poster in an order mail. The third part to fix. We need to create an xml file with a pdf of this custom poster when the order is placed. So we can quickly pick up for printing. We have mockups for clearly understanding what we want to get help with to share. Hope you understand what we searching for, can you please get us an offert of this three functions we need help with. Best regards Kim Dahlberg Victor Palm