Senior Shopify Integration Engineer (Contract)

About us:

Working at Tech Holding isn't just a job, it's an opportunity to be a part of something bigger. We are a full-service consulting firm that was founded on the premise of delivering predictable outcomes and high-quality solutions to our clients.  Our founders and team members have industry experience and have held senior positions in a wide variety of companies – from emerging startups to large Fortune 50 firms – and we have taken our combined experiences and developed a unique approach that is supported by the principles of deep expertise, integrity, transparency, and dependability.

Role Overview

We are seeking a Senior Shopify Engineer to lead the technical integration of a bespoke Product Studio - a React-based 2D product customizer - into a Shopify Plus storefront. You will be the technical bridge between our custom design interface and the Shopify e-commerce engine, ensuring a seamless user journey from design to checkout for a high-end luxury fashion brand.

Key Responsibilities

• Iframe Architecture: Lead the integration of a standalone React application into the Shopify Liquid framework, ensuring smooth communication between the two environments.
• Dynamic Pricing Engine: Implement secure logic to calculate real-time product pricing based on 2D customisation selections (fabrics, patches, hardware) passed from the React app.
• Checkout Integration: Configure the "Add to Cart" flow to capture custom design metadata and a dynamically generated 2D thumbnail of the user’s creation, passing them as line-item properties to the Shopify checkout.
• Production Workflow Automation: Build or configure a backend service (via Webhooks) to dispatch detailed design briefs and high-resolution assets to the production team once a customization order is processed.
• Performance & UX: Ensure the iframe implementation is responsive and optimized for mobile, maintaining the premium feel of a luxury shopping experience.

Technical Requirements

• Shopify Mastery: Extensive experience with Shopify Plus, Custom Apps, and the Storefront/Admin APIs.
• React & Frontend: Strong proficiency in React.js and experience with CSS-in-JS or Tailwind for maintaining visual consistency.
• Bridge Communication: Expert knowledge of the postMessage API to sync the customizer state with the Shopify parent theme (e.g., updating cart counts, price displays).
• 2D Image Handling: Familiarity with handling dynamic image compositions, canvas exports, or 2D layering logic to generate design previews.
• Liquid & Theme Development: Ability to modify existing Shopify themes to accommodate the customizer embed without breaking site-wide styles.
• Security: Deep understanding of HMAC validation and secure API proxying to protect custom pricing logic.

Preferred Ǫualifications

• Previous experience in luxury e-commerce or high-ticket "made-to-order" retail.
• Experience with Klaviyo or Orderly for triggering asset-rich transactional emails.

Tech Holding is proud to be an Equal Opportunity Employer and is committed to fostering a diverse and inclusive workplace. We welcome applicants from all backgrounds and experiences, and we consider qualified applicants without regard to race, color, religion, gender, sexual orientation, gender identity, national origin, disability, veteran status, or any other legally protected characteristic. If you require accommodation in the application process, please contact our HR