You have a rad designer-created layered Photoshop, XD, or Sketch file that you want coded into a fully functional store. It will have at least basic references to Index (home) page content, some kind of product Collection matrices, and individual Product detail pages. You will most likely reference some static ("About Us" etc.) Pages, possibly a Blog (maybe more than one). You do not have to provide for a cart page, although it would be nice. (see the wiki for more about Shopify’s templates.)
To round out your custom theme you may want to consider the following optional services:
tailoring of the enclosed checkout process
Shopify uses a unique, enclosed, checkout process. The hosted nature of these pages ensures their security. However, I can create a custom checkout styles file for a Shopify Plus store, to align these pages to your overall theme styling.
styled HTML email notification templates
By default your customers will receive plain text notification emails when they place an order and when that order is updated (e.g. with shipping info, tracking numbers etc.) I can create professional custom branded HTML email templates that you can use in their place.
theme-based customer accounts styling
Shopify’s Customer Accounts are not activated by default. If you want to give your customers the ability to access their order history information, update their address and payment details, and have that available to them pre-filled on their next checkout order form, you can do that at the flick of a switch. If you want those pages to be styled in-line with your theme, I can do that too!