Website building for 3-D Printing business

I want to launch a website where any can upload 3D model files and instantly order 3D printed part. The flow of the website should feel as easy as a classic e-commerce checkout, yet be robust enough for professional, end-use production.

Key requirements
• Clean, responsive UI that works on desktop and mobile.
• Secure file-upload workflow that accepts common formats (STL, STEP, OBJ).
• Integration with a 3D part viewer to see the uploaded STL file and calculate volume of the part. The volume will be used for pricing.
• Automatic pricing based on custom formula so customers see price before paying.
• Checkout with major payment gateways and tax/shipping calculations.
• A back-office dashboard that lets my team move each job through production stages and share real-time order tracking with the customer.

When you reply, focus on the experience you have with similar e-commerce website making, especially anything involving file uploads, order-tracking dashboards or 3d viewer. Links or brief screenshots of live work will help me shortlist quickly.

Looking forward to collaborating on a streamlined, professional solution that turns uploaded designs into shipped parts with zero hassle for the user.