Hi Raphael,
I'd be very interested in discussing your project. I have been a Shopify merchant for the past 6 years, and a designer/developer for the past 3 years. This has given me a wealth of experience in understanding Shopify and ecommerce from the merchant, user, and developer's perspectives.
My most recent project was planning, designing, and developing a theme from scratch for a high-end footwear brand: [login to view URL]
The plan for your project would be:
1) RESEARCH: Understand your needs. We'd get an understanding of your business, goals, products, target market, and current branding. If we believe the project is suitable to Shopify, then we move on to:
2) PLANNING: This would involve a design phase of gathering websites, elements, and other styles/examples to understand what you like. In conjunction with this, we'd be planning your site architecture, listing out content, and considering what functionality is required. Once done, we would settle on a general design theme.
3) IMPLEMENTATION: Depending on our planning we would look to either use an existing theme and make modifications, or develop a theme from scratch. All the coding will be done in this phase.
4) REFINE: Once the bulk of the coding is completed, we would undergo some performance testing, and then one further round of design revisions to ensure you're happy.
If you're interested in discussing in greater detail, I'd love to hear from you. Otherwise, best of luck with your project.