SW-01.2 Build

Move off the legacy stack without stopping the business.

Modernisation is the incremental migration of a legacy system to a modern stack. StackWisp maps what the old system really does, moves it piece by piece behind a stable interface, migrates the data with a tested plan and cuts over without downtime, so the business keeps running the whole time.

2026 · CLOUD-NATIVE SERVICES2019 · PHP MONOLITH2012 · ON-PREM SQL SERVER2004 · SPREADSHEETS AND EMAILcron.phpSELECT * FROM orders_old=VLOOKUP(B2,Sheet3!A:F,4)MIGRATED · ZERO DOWNTIME
Fig. SW-01.2 Legacy layers below, a migration shaft carrying data to the surface.

Modernisation & re-platforming · capabilities

What's included

SW-01.2.1

System archaeology

We map how the current system behaves in practice, including the jobs, reports and spreadsheets that grew up around it.

SW-01.2.2

Incremental migration

New services replace old ones a slice at a time behind a stable interface, so there is never a risky all-at-once switch.

SW-01.2.3

Data migration plans

Deduplication, validation rules and rehearsed migration runs, with reconciliation reports before anything goes live.

SW-01.2.4

Zero-downtime cut-overs

Parallel running, feature flags and one-click rollbacks keep each cut-over reversible.

Tell us what you want to build.