Stylish E-commerce Website for Diamonds

I'm seeking a developer to create a modern, stylish e-commerce website for selling both natural and laboratory-grown diamonds. The site needs to handle an extensive inventory of over 100,000 items with a user-friendly interface for potential clients to filter their search according to various quality parameters.

Key Features:
- A sleek, contemporary design that embodies a modern and stylish appearance
- Comprehensive filtering options for customers: by price, diamond type (natural or lab-grown), weight (carats) and measurement, cut, polish, symmetry, fluorescence, L/W ratio, table, depth, and certificate
- Real-time data retrieval from our suppliers' API

The tech stack could be HTML, JS, CSS (or Bootstrap) for the frontend, and PHP or ASP.NET for the backend. Speed is crucial, so I'm open to any efficient solution you can provide. Ideal candidates for this project should have:

- Proven experience in e-commerce website development
- Strong skills in the suggested technologies
- Prior work with real-time data integration from API
- A portfolio showcasing modern, stylish web designs
- Excellent understanding of quality parameters related to diamonds would be a plus