Storefronts, POS systems, and marketplaces engineered for real transaction volume and real edge cases.
Commerce systems fail in the details — the refund that doesn't quite reconcile, the discount that stacks wrong, the checkout that times out during a spike. We've built storefronts, point-of-sale systems, and multi-vendor marketplaces, and we design for those edge cases from the start rather than patching them after a support ticket.
Whether you need a custom storefront, an in-house POS system, or a marketplace connecting multiple sellers, we build on top of proven payment infrastructure while keeping the parts that matter to your business fully custom.
We map the full transaction lifecycle — including refunds, disputes, and failed payments — before writing checkout code, so the unhappy paths are designed on purpose instead of discovered in production.
1const providers = {
2 payments: ["Stripe", "PayPal"],
3 platforms: ["Shopify", "WooCommerce", "Custom POS"],
4 database: ["PostgreSQL"],
5};Checkout looks simple until real money, real retries, and real edge cases hit it. This is what we design around from the start.
A retried payment request can never double-charge a customer — every mutation carries a unique key the gateway checks first.
Tokenization and hosted fields keep raw card numbers with the payment provider, cutting PCI compliance scope dramatically.
Every payment callback is cryptographically verified — an attacker can't fake a "payment succeeded" event by guessing your webhook URL.
Reconciliation jobs actively alert when system-of-record inventory disagrees with reality, instead of quietly writing to a log nobody reads.
Every order has a defined set of valid states and transitions — "partially refunded after a dispute" is a designed case, not a bug report.
The checkout flow specifically — not just the homepage — is load-tested against realistic sale-event traffic before it matters.
Often a friction or trust issue in the flow itself — we instrument first, then fix.
A sign the unhappy-path logic was never really designed — very fixable.
Usually a sync issue between systems that don't talk to each other reliably.
Load testing against your actual checkout flow answers this before it's a crisis.
Yes — we'll recommend custom vs. platform based on your actual requirements, not a one-size-fits-all pitch.
Yes — we design payment flows to minimize your compliance burden, typically by keeping card data with the payment provider.
Yes, including data migration planning so historical orders and customers carry over cleanly.