Squarespace to Shopify Migration

My current site—https://balancemyfrequency.squarespace.com/—runs on Squarespace with a dynamic product catalog and several custom data feeds. I now need the entire experience rebuilt on Shopify.

The job covers three big pieces:

1. Theme recreation
I want the new Shopify theme to mirror the look and feel of the Squarespace version, keeping the same layout, colour palette, typography, and overall user flow. The design will span 5-8 core pages (home, shop, product detail, blog, about, contact, plus any supporting pages you feel are essential).

2. API workload
Roughly 25-30 APIs have to be wired back in. They include payment, shipping, inventory, CRM, and a few proprietary endpoints. All calls should be handled securely through Shopify’s best-practice methods (Admin API, Storefront API, webhooks).

3. Content + functionality parity
Every front-end and back-end behaviour that exists on Squarespace—product listings, cart, checkout, customer accounts, blog posts—must work the same or better on Shopify.

Acceptance criteria
• Theme renders responsively across modern browsers and mobile devices
• All APIs return correct data and trigger expected actions without console errors
• Checkout flow completes a real test order from product page to confirmation email
• Page-speed scores meet Shopify’s recommended thresholds

Please scope the work, outline your preferred integration stack (Liquid, GraphQL, REST, third-party apps, etc.), and let me know the estimated timeline for each phase.