Build an Online Store - Using shopify

We are a jewelry company looking to create an online store to feature our products and collections, and also sell. We sell on multiple platforms - ebay, amazon, and online, and that is why we want to use shopify as our base platform to help sync all aspects of our online business. We are looking for a designer/builder to take our vision, and our ideas and make them work. We have examples of our designs to help guide the process, and we can demonstrate what we are exactly looking for. The Main Objectives: - Create a well thought out design and flow for the customer - Be able to focus specific brands or sales / events - be able to handle multiple streams of inventory - drop ship catalog, and our own onsite products - optimize for SEO - instruct us on how we need to breakdown our inventory CSV files for optimization, seo tags... I understand this is a general brief of what we are looking for so please ask questions if you need it to help you generate a quote.