Shopify Custom Product Page Template Development

I'm looking for an experienced Shopify developer who can create a custom product page template for my store. This template will facilitate a three-step product creation process for consumers:

Step 1: Select Shape
Step 2: Select Design
Step 3: Input their name and email for the product to be added to the cart and emailed to them.

I have already prepared:
- 3D renders of all the shapes
- 3D render of all the shape and design combinations
- The overall front-end design

Your task will be to write the back-end template code necessary for this project.

In terms of specific requirements:
- The custom email notifications should include an order summary
- The order summary should contain images of the selected product

Please note, I do not require any additional customizations for the backend template beyond the custom email notifications. Skills in inventory management and third-party API integration are not necessary for this project.

Ideal candidate should have:
- Extensive experience with Shopify
- Proficiency in back-end template code
- Expertise in creating custom product page templates
- Ability to integrate visual elements into email notifications