Storefront build and performance • Own the Shopify theme end to end: Liquid, JSON templates, sections, blocks, metaobjects. • Hold Core Web Vitals in the green on mobile. Most of our traffic is a parent on a mid-range Android phone on 4G, and every 100ms shows up in conversion. • Ship the size-selector, expandable-sole explainer and size-chart experiences - the highest-leverage conversion surfaces we have. Conversion and experimentation • Build and instrument A/B tests on PDP, collection and cart. Work with marketing on hypotheses, not just implementation. • Implement analytics and event tracking correctly: GA4, Meta CAPI, server-side tagging, consent handling. Apps, integrations and data • Evaluate, integrate and - where an app is bloating the theme - replace apps with native code. Every app you add is a performance and cost decision you'll be asked to defend. • Integrate with WMS/3PL, ERP, returns, reviews, WhatsApp/SMS and marketing automation via Shopify Admin and Storefront APIs and webhooks. SEO and AEO implementation • Implement JSON-LD (Product, CollectionPage, FAQPage, BreadcrumbList, ItemList), clean heading structure, canonical and hreflang handling. • Build collection and blog templates that let the content team publish tables, FAQ blocks and cited copy without touching code. Reliability • Version control, staging themes, code review, rollback plan. No editing live theme code on a Friday evening. • Own peak-season readiness: sale events, launch drops, traffic spikes.