E-commerce Site for Custom Products

I'm looking for a talented web developer to create an e-commerce website for selling custom-printed physical products. The key feature of this site is its ability to let customers upload their own images to be printed on the products. Want customer to upload artwork and be able to view on a blank mockup, get pricing, and order product. Please let me know how you will do this and if there will be monthly fees associated with it.

Key Features:
- User-friendly interface for customers to upload images
- Integration of these images onto various physical products
- Secure and efficient payment gateway
- Responsive design for all devices

Ideal Skills:
- Proficient in e-commerce website development
- Experience with integrating user-uploaded content
- Strong understanding of UI/UX principles
- Knowledge of security protocols for online transactions

Please, only bid if you can deliver a high-quality site that meets these requirements. Looking forward to your proposals!