Vertexa Technologies
Commerce replatform delivered on the original date

Commerce replatform delivered on the original date

Aventis Retail

Largest Contentful Paint
1.3s Largest Contentful Paint
Conversion rate, year on year
+23% Conversion rate, year on year
Products migrated
42,000 Products migrated
Trading downtime
0 hrs Trading downtime

Migrating 42,000 products and fifteen years of order history without a trading interruption.

The challenge

Aventis were running a heavily customised commerce platform that had reached the end of vendor support. Peak trading exposed performance problems that had no remaining engineering path.

The migration window was fixed by the trading calendar: it had to complete before the autumn peak, or wait a year.

What we did

We ran catalogue migration and front-end rebuild as parallel workstreams, with a data reconciliation harness running from week two so migration defects surfaced continuously rather than at the end.

The storefront was rebuilt for Core Web Vitals from the start rather than optimised afterwards.

The result

Launch happened on the date committed in month one. Largest Contentful Paint improved from 4.1s to 1.3s, and conversion rate rose 23% year on year at equivalent traffic.

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