Expert Shopify Developer Needed - Custom "Master Product Page" with Recharge Integration

Project Title: Expert Shopify Developer Needed - Custom "Master Product Page" with Recharge Integration Project Overview We are seeking an experienced Shopify Developer to build a high-converting, dynamic "Master Purchasing Interface" for ghrproducts.com. VISUAL REFERENCE (The Target Functionality): We want to replicate the exact user experience found on our affiliate site. Please view the following URL to understand the required behavior (radio buttons, quantity tabs, and instant price updates): LINK: CRITICAL REQUIREMENT: This project involves tight integration with the Recharge Subscription App. We have a large base of existing subscribers. The solution must work seamlessly with our existing Recharge setup and must not disrupt current subscription data or processing. The Objective: Currently, our catalog is fragmented. We have separate product pages for "30-Day Supply," "90-Day Supply," etc. We need to consolidate these into Single Master Product Pages (e.g., one page for "Men's GHR") where the customer can toggle between options without leaving the page. The Required User Interface (UI): The interface must feature two distinct selector sets. 1. Purchase Model (Radio Buttons): ( ) One-Time Purchase (Standard Price) (•) Subscribe & Save (Discounted Price + Auto-ship) 2. Quantity Selector (Tabs or Buttons): [ 1-Month ] [ 3-Month ] [ 6-Month ] [ 12-Month ] The Core Logic ("The Switchboard"): Because we utilize specific SKUs for different offers, we are NOT just using Shopify Variants. "Hidden Product" Strategy: The code must look up "Hidden" (unpublished) Shopify products based on the user's selection. Example Scenario: User selects "Subscribe & Save" + "3-Month Supply". The JavaScript must instantly find the corresponding hidden product ID (e.g., ghr-men-3mo-sub). The "Add to Cart" button must update to add that specific product ID to the cart. The Price displayed on the page must update instantly. Business Rules & Constraints: 1. The 12-Month Exception: If the user selects "12-Month Supply," the "Subscribe & Save" option must be auto-disabled (we do not offer subscriptions on the annual supply). 2. Recharge Compatibility: The "Subscribe & Save" path must successfully trigger the Recharge checkout flow (or the Shopify Checkout with Recharge selling plans attached), ensuring the customer is actually enrolled in the subscription. 3. Theme: The store uses Dawn v15 (Online Store 2.0). The solution should be implemented as a reusable Custom Section. Deliverables: 1. Development: Build the custom Liquid/JS section. 2. Implementation: Configure the section on 4 Master Product Pages (GHR Men, GHR Women, NAD+7 Men, NAD+7 Women). 3. Testing: Verify that "Add to Cart" works correctly for all combinations (One-Time vs. Sub) and that subscription items appear correctly in the cart with Recharge properties. To Apply: Please confirm you have experience with Recharge integrations. Briefly explain how you will handle the dynamic product swapping (One-Time vs. Subscription) to ensure the correct SKU is passed to the checkout. Apply tot his job