Headless Commerce Storefront

Storefronts sit at the intersection of three moving systems: content, catalog, and stock. When the architecture doesn't handle invalidation and consistency deliberately, the seams show up as stale pages, oversold items, and checkout drift.

• •Server-rendered pages must update when editors publish, without full rebuilds
• •Inventory shown on a product page can be wrong by the time checkout completes
• •Cart and checkout state must survive session loss and concurrent stock changes
• •Payment webhooks arrive out of order and must be reconciled idempotently
• •Editorial layouts need flexibility without letting content break the design system

We combined incremental static regeneration with an event-driven inventory service, so pages stay fast and cacheable while stock and order state remain transactionally correct.

• Used Next.js ISR with tag-based revalidation triggered by CMS publish webhooks
• Modeled editorial pages as typed content blocks mapped to design-system components
• Built the inventory service around transactional stock reservations at add-to-cart and checkout
• Processed Stripe webhooks idempotently with an event log driving order state transitions
• Cached catalog reads through Redis with invalidation keyed to product and stock events