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38233791883 - Senior Shopify Plus Full-Stack Engineer at Activate Talent. Position: . Senior Shopify Plus Full-Stack Engineer. Job Type. : Full-Time - 100% Remote. Working hours:. US Timezone (PT). About Our Client. Our client is a fast-growing wellness brand on a mission to make high-quality, science-backed supplements accessible to families everywhere. Founded with a vision to reimagine the wellness industry, the company combines innovation, storytelling, and a relentless focus on customer experience. As the brand scales rapidly, its digital storefront plays a central role in driving growth—and they are seeking a Senior Shopify Plus Full-Stack Engineer to help elevate it to the next level.. About the Role. As a Senior Shopify Plus Full-Stack Engineer, you’ll lead the architecture, development, and optimization of our Shopify Plus storefront and checkout. You'll own everything from Liquid and Hydrogen builds to advanced integrations like Amazon SP-API for inventory synchronization. This is a high-impact, cross-functional role where your work directly supports our mission and growth.. Responsibilities. . Shopify Plus Architecture: Own the technical architecture and performance of our Shopify Plus storefront, including Liquid templates and Hydrogen-based builds.. . Custom Development: Build and maintain custom Shopify apps, checkout extensibility features, and backend integrations tailored to our unique business needs.. . Inventory Sync: Develop robust integrations with the Amazon Selling Partner API (SP-API) to align D2C and marketplace inventory.. . Performance Optimization: Monitor, test, and optimize site speed and performance for a seamless customer experience.. . Cross-Functional Collaboration: Work with Product, Marketing, Design, and Operations to launch new features, campaigns, and optimizations.. . Technical Leadership: Guide best practices in e-commerce engineering and Shopify innovation, making scalable architecture decisions.. . Maintenance & QA: Own the stability and reliability of your code through testing, debugging, and proactive maintenance.. . Requirements. . 5+ years of full-stack engineering experience, including deep experience with Shopify Plus.. . Strong command of Liquid, Hydrogen, React, Node.js, and Shopify APIs.. . Familiarity with the Amazon SP-API or other complex marketplace integrations.. . Prior experience developing production-grade e-commerce systems.. . . Excellent problem-solving, debugging, and architectural skills.. . Passionate about clean code, robust testing, and great user experiences.. . Proficient with Git and modern development workflows.. . Curious, self-directed, and comfortable working in a fast-paced, startup environment.. . . Nice to have. . Experience with headless commerce setups.. . Previous work in D2C wellness or consumer e-commerce brands.. . Familiarity with ERP systems, third-party logistics, or fulfillment integrations.. . . Company Location: Philippines.