Checkout rebuild for a mid-size e-commerce store
+38% checkout conversion in 60 days.
A store doing steady traffic was losing buyers at the last step: a five-screen checkout, three third-party scripts fighting each other, and a 6.4-second load on mobile. Cart abandonment sat above 80%, and two previous "quick fix" attempts by different freelancers had left conflicting code behind.
The owner knew the number that mattered — revenue per visitor — was far below category benchmarks, but not why.
Instead of patching the existing checkout, I rebuilt it as a single-page flow with the payment provider integrated directly, stripped every non-essential script from the purchase path, and moved fraud checks server-side.
Because the store handles card data adjacent flows, the rebuild included a full security pass: dependency audit, CSP headers, rate limiting on the payment endpoints, and removal of two abandoned plugins with known vulnerabilities.
- ▸ Single-page checkout with server-side validation
- ▸ Direct payment-provider integration (no third-party wrapper)
- ▸ Security: CSP, rate limiting, dependency audit, plugin cleanup
- ▸ Performance: purchase path scripts cut from 14 to 3
The store stays on a Growth subscription: monthly dependency audits, SEO monitoring, and iterative improvements to the purchase funnel.
Client name withheld under NDA. References available on request.