Retail · Northwind Retail
Replatforming 340 stores without a single lost sale
A retailer moved off a decade-old monolith to headless commerce during its busiest trading quarter.
- Minutes of downtime
- 0
- Faster page loads
- 3.1×
- Mobile conversion
- +23%
The challenge
The legacy platform fell over every peak day and no one was willing to touch it. Each outage cost roughly the price of the replatform itself.
What we did
- 01Used the strangler pattern — routed traffic feature by feature, never big-bang
- 02Rebuilt checkout first, because that was where the revenue was bleeding
- 03Ran load tests at 3× historical peak before every cutover
- 04Kept the legacy system live and switchable for the full migration window
- 05Trained store teams on the new tooling before their region migrated
The outcome
Zero downtime across the migration, page loads three times faster, and the first peak trading day in four years without an incident bridge.