Cascade Retail Group migrated 400 applications in 11 months.
Without a single missed peak-season deadline, and a 31% reduction in infrastructure cost along the way.
Cascade came to Vertane with a data centre lease expiring in fourteen months and four hundred applications with no current dependency map. The constraint that shaped everything was retail seasonality: nothing could move between October and January.
We sequenced the migration into risk-ordered waves, moving the least entangled workloads first to build confidence and tooling, and holding the three most complex systems until the team had migrated a hundred applications successfully. Every wave shipped with a tested rollback that was exercised, not assumed.
All four hundred applications were migrated in eleven months, inside the lease deadline, with no missed peak-season window and a 31% reduction in run cost against the previous estate.
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