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    E-Commerce Storefront

    A conversion-focused e-commerce storefront: ISR product pages, Redis-backed carts, real-time inventory reservations, and a one-page checkout on Stripe. PostgreSQL holds orders and stock; pgvector powers “similar products” without a second search vendor.

    1K – 500Kusers supported
    $200 – $2,500/month infrastructure

    Architecture Diagram

    Interactive — hover over any node to see its role and description.

    ShopperStorefrontNext.js ISRCommerce APINode.jsRedisCart + stockPostgreSQLOrders + catalogStripeCheckoutFulfillmentShippoEmailSendGridUserFrontendAPICacheDatabaseExternalQueue

    Use Cases

    DTC brand storefront replacing a slow theme
    Multi-currency catalog with accurate stock
    Flash-sale events that must not oversell
    SEO-heavy collection pages with sub-second TTFB
    Logged-in accounts, wishlists, and reorder

    Technology Stack

    frontend

    Next.jsReactTailwind CSS

    backend

    Node.jsExpressTypeScript

    database

    PostgreSQL + pgvectorRedis

    infrastructure

    Vercel / CloudFrontAWS RDSS3Docker

    integrations

    StripeSendGridShippo

    Scalability Roadmap

    Stage 10 – 2K users· Vercel + RDS + Redis

    ISR storefront. Single Redis for carts. Postgres for catalog and orders.

    Stage 22K – 50K users· CDN + replica + workers

    CloudFront in front of product JSON. Read replica. Queue for emails and labels.

    Stage 350K – 200K users· Aurora + Redis Cluster

    Aurora for checkout writes. Redis Cluster for reservations during sales.

    Stage 4200K+ users· Multi-region catalog reads

    Regional storefronts, catalog replicas, checkout pinned to the write region.

    Cost Breakdown

    Development Cost

    $18,000 – $45,000 (10–18 weeks)

    Infrastructure Cost

    $200 – $2,500/month plus Stripe fees

    Maintenance Cost

    $2,000 – $6,000/month for merchandising, promotions, and peak-sale readiness

    Security Considerations

    Stripe holds card data — application never sees PAN
    Inventory reservations expire so abandoned carts cannot lock stock forever
    Idempotency keys on checkout to block double-charge on retry
    Signed webhooks only; order status cannot be spoofed from the client

    More Architectures

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    Headless Commerce

    Next.js storefronts on a composable commerce API and CMS

    E-Commerce

    Inventory & OMS

    Real-time stock, reservations, and multi-warehouse allocation

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