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We are seeking a Senior Shopify Integration Engineer, for a project-based assignment, to lead the integration of a custom React-based product customization application into a Shopify Plus storefront. This is a highly hands-on role focused on connecting an external product configurator with Shopify’s commerce engine. You will own the end-to-end integration, ensuring seamless data flow between systems, including pricing logic, customization data, order metadata, and downstream workflows such as internal notifications and email triggers. You will be responsible for designing and implementing bidirectional communication between the React application and Shopify, enabling a premium, real-time customization experience for end users.
Job Responsibility:
Lead the integration of a standalone React-based product customizer into a Shopify Plus storefront (via iframe or app integration)
Design and implement secure cross-application data exchange between the custom app and Shopify (e.g., postMessage, iframe communication, APIs)
Build dynamic pricing logic based on user customization inputs (materials, placements, add-ons, etc.)
Capture and persist customization data through the Shopify cart and checkout using line-item properties
Implement “Add to Cart” flows that include custom metadata and generated product previews
Configure backend workflows using Shopify Webhooks to trigger internal processes, notifications, and email-based workflows (e.g., order events, production handoff)
Ensure high performance and responsiveness across desktop and mobile environments
Collaborate with frontend, backend, and product teams to ensure a seamless user experience
Requirements:
5+ years of experience with Shopify development, including Shopify Plus
Strong experience integrating custom applications into Shopify storefronts (not just theme development)
Proficiency in React.js and modern frontend development
Experience with Shopify Storefront API, Admin API, and custom apps
Hands-on experience implementing cross-application communication (e.g., postMessage, iframe integrations, APIs)
Experience working with Shopify cart and checkout flows, including line-item properties
Strong understanding of JavaScript, web security, and cross-origin communication