Custom E-Commerce Site Development

I'm looking for a skilled web developer to build a fully functional, custom E-commerce site from scratch. The website should be built using the latest tech stack, ensuring optimal performance, security and scalability.

Key Requirements:
- Implementing a user-friendly shopping cart system
- Seamless Payment Gateway Integration for smooth transactions
- Robust User Account Management system

Ideal Skills:
- Proficient in the latest web development technologies and frameworks
- Extensive experience in custom E-commerce site development
- Strong understanding of implementing e-commerce functionalities
- Knowledgeable in creating secure, user-friendly interfaces

Please provide examples of your previous work in custom E-commerce development.