Composable headless commerce stack: Next.js App Router with React Server Components and ISR on Vercel Edge for sub-100ms TTFB, Supabase/PostgreSQL with connection pooling and read replicas for catalog and order management, Stripe for payment processing. Monorepo structure (Turborepo) separates customer storefront and admin dashboard with shared API contracts. Load tested to 300K RPM with k6 against graduated traffic profiles.
How do you achieve sub-100ms TTFB on ecommerce pages with dynamic pricing and inventory?
We use React Server Components with ISR on Vercel's Edge Network. Product pages render server-side at the nearest edge node with stale-while-revalidate caching. Dynamic data like inventory counts and pricing stream in via Suspense boundaries after the initial shell renders. This keeps TTFB under 100ms while surfacing real-time data within 200ms of page load.
Can this architecture handle Black Friday or flash sale traffic spikes?
Yes. We load test every platform to 300K RPM burst conditions using k6. Vercel's serverless infrastructure scales horizontally. Supabase connection pooling via PgBouncer prevents database saturation. Edge caching absorbs the bulk of read traffic. We've validated graceful degradation patterns so checkout flows stay functional even when ancillary services experience latency spikes.
Why Supabase instead of a dedicated commerce backend like Medusa or Saleor?
Supabase gives us full PostgreSQL control without the abstraction tax of commerce-specific ORMs. We model catalog, inventory, orders, and pricing directly in relational tables with Row Level Security for multi-tenant B2B. Real-time subscriptions handle inventory sync. Edge Functions handle business logic. You own the data layer completely — no vendor lock-in to a commerce platform's schema.
How do you handle PCI compliance with Stripe integration?
We never touch or store payment credentials. Stripe Checkout Sessions and Payment Intents handle all sensitive card data. Server-side Stripe SDK calls run in Vercel Serverless Functions with encrypted environment variables. This keeps PCI scope at SAQ-A level — the lightest compliance burden available. Webhook handlers use idempotency keys and signature verification to block replay attacks.
What does migration from a monolithic platform like Magento or Salesforce Commerce Cloud look like?
We run a parallel deployment during discovery. The new headless storefront launches alongside the existing platform with traffic splitting by route. Product data migrates to PostgreSQL via ETL scripts validated against source systems. We cut over route-by-route — category pages first, then PDP, then checkout — which limits risk at each step. Full migration typically completes within 16-24 weeks.
How do you handle multi-region and multi-currency requirements?
Vercel's Edge Network serves from 30+ global PoPs automatically. We implement locale-aware routing with Next.js middleware that detects region and serves localized content. Stripe handles multi-currency pricing natively. Supabase read replicas can deploy regionally for data locality. Product catalogs support per-region pricing, availability, and content through PostgreSQL views.
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