Need a Shopify API expert

I require someone with relevant shopify API experience to design and build my webstore with specific requirements.

The API need will have to upload and delete products from a CSV file (diamonds) which is updated daily from my supplier, there are over 8000 items which needs to be listed and it will also require a search/filter function for the customers to browse and purchase the diamonds off that list. You will be working with someone else to help you with this part.

I also have approx 300 models of jewellery that need to be uploaded and categorised. Please show me any web stores you have made with similar specs