Retail and ecommerce is the industry where every millisecond and every basis point compounds into a number the CFO recognizes. A 100ms slower hero image on a product detail page shows up in conversion rate. A 0.5% inventory accuracy gap shows up in cancellations and customer-service tickets. My retail work starts from the unit economics and works backwards into the architecture, not the other way around.
Headless commerce is the dominant pattern for any retailer who outgrew Shopify Plus or Salesforce Commerce Cloud's templating layer. Hydrogen, commercetools, Saleor, and Medusa each have legitimate reasons to exist, and the right answer depends on your team's stack, your product complexity, and how much of the merchandising experience you want to own. I help teams choose and migrate without losing organic traffic, which means careful URL preservation, redirect mapping, and a phased rollout that doesn't tank Lighthouse scores during the cutover.
Performance is the silent feature that drives retail revenue. Core Web Vitals are now ranking signals, and edge rendering is the lever that moves them most. I build storefronts on Next.js with edge-rendered product detail pages, ISR for category pages, and aggressive Cloudflare or Vercel CDN caching tuned to inventory cadence. Image optimization (AVIF/WebP at the right sizes), font subsetting, and JS bundle discipline are non-negotiable. The goal is sub-1.5s LCP on the median mobile device, not a perfect Lighthouse score on a fiber connection.
Inventory and order management is where the back-end gets harder than the front-end. Real-time accuracy across DTC, Amazon, eBay, retail stores, and 3PLs requires an OMS that treats inventory as an event-sourced ledger, not a snapshot. I design OMS systems where every reservation, allocation, and fulfillment is an event, with reconciliation jobs that catch the inevitable drift between systems. Black Friday traffic patterns aren't just higher load, they're different load: read-heavy on browse, write-heavy in waves on checkout, with a 10-second SLA on cart-to-confirmation that decides whether the page is a sale or an abandonment.
Payments and PCI scope reduction are the parts most teams underinvest in until the audit. Tokenization through Stripe, Adyen, or Bolt should be the default, and the merchant systems should never see a raw PAN. I build checkout flows with proper SCA handling for European traffic, network-tokenized card-on-file for repeat purchases, and fraud orchestration through Signifyd, Forter, or Riskified that doesn't accidentally reject high-LTV customers. See a recent ecommerce optimization or start a project if your storefront needs to actually move the conversion rate this year.