Headless commerce build broken or behind schedule.Engineer in 10 minutes.

PM scopes your headless migration in session 1. The first decision is architecture: do you want a full headless storefront (Next.js or Remix frontend, Shopify as the commerce backend), or a partial headless approach (headless homepage and product pages with Shopify's native checkout intact)? The full headless approach gives maximum frontend flexibility but requires building and maintaining your own cart, search, and account UI. The partial approach is lower risk your existing Shopify checkout is proven and payment-compliant, and you only go headless where you need custom UI. For most clients, PM recommends starting with the partial approach: headless product display pages and custom homepage, Shopify native checkout, evaluated against your specific UX requirements.

For a headless Shopify storefront, one full-stack engineer can handle the complete implementation in a Sprint Pack the frontend (Next.js App Router with Shopify Storefront API data fetching), cart management (Shopify Cart API with client-side state management), product search and filtering (Shopify Search and Discovery API or Algolia integration), and account portal (Shopify Customer Account API). The engineer uses Shopify's official Hydrogen components as a base where appropriate, customising the UI to your design system rather than building from scratch. For more complex projects custom checkout, B2B pricing, multi-storefront PM pairs a frontend specialist with a Shopify backend specialist in the same Sprint Pack to split the workload.

Yes. Headless storefronts commonly develop performance issues as they grow. The engineer diagnoses your specific bottleneck: if it is slow Storefront API queries (fetching product data on every page request without caching), the fix is implementing Next.js full-route caching or a Redis cache layer for Storefront API responses; if it is large JavaScript bundles (the headless storefront has grown to include dozens of npm packages), the fix is bundle analysis with webpack-bundle-analyzer and replacing heavy libraries with lighter alternatives; if it is waterfall data fetching (the page cannot render until three sequential API calls complete), the fix is parallelising the data fetches using Promise.all; if it is no CDN for product images, the fix is routing images through Cloudflare Images or Vercel Image Optimisation. The engineer measures your Core Web Vitals before and after to confirm the improvement.

Recommendation depends on your content team's technical comfort and your content structure complexity. Sanity is our most common recommendation for e-commerce: its structured content model works well for product-adjacent content (editorial pages, lookbooks, blog posts with embedded products), the real-time collaborative editing is valued by marketing teams, and GROQ (its query language) is powerful for complex content relationships. Contentful is better if your content team needs maximum simplicity and you have straightforward page structures its UI is more intuitive for non-technical editors. Prismic is the best choice if you need a slice-based page builder where marketing can assemble pages from pre-built components without developer involvement. For a Shopify headless storefront, Sanity's Shopify integration (syncing product data into Sanity for editorial enrichment) is the most complete solution.

Headless makes sense when your requirements exceed what Shopify's native theme system can deliver: a fully custom UI that looks nothing like a Shopify store (gaming companies, luxury brands, complex configurators), page load performance requirements below 1 second LCP on product pages that Shopify themes structurally cannot achieve due to Liquid rendering limitations, a multi-storefront architecture serving different regions or brand verticals from a single Shopify backend, or a content-commerce integration where editorial content and product content are deeply intertwined in ways the Shopify theme cannot support. Headless does not make sense when: your current Shopify theme meets your design requirements with customisation, your team lacks the engineering capacity to maintain a separate frontend codebase, or you are pre-product-market-fit and the added complexity slows iteration. PM assesses your specific requirements against these criteria honestly in the first session.

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