Northwind runs a regional retail chain whose ordering, inventory and loyalty systems had grown up on servers under a desk — literally. Hardware failures were cutting into trading hours, and nobody could say which version of the truth any report showed.
Northwind Cloud Migration
Retail · Cloud Migration · 14 weeks, zero downtime through peak season.
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Forty Services, One Calm Move
Peak Season Was Non-Negotiable
The migration window overlapped the busiest trading quarter. Any outage during ordering hours meant lost sales and empty shelves — so a big-bang cutover was off the table from day one.
- Undocumented services with hidden dependencies between stores
- Nightly batch jobs nobody dared to touch or reschedule
- Staff who needed training without closing a single till
Migrate in the Open, Verify Everything
We moved one department at a time behind parallel infrastructure, replaying real traffic against the new stack before each cutover. Automated checks compared old and new outputs nightly, and every store manager got a one-page rollback card they never needed to use.
Training ran in short floor-side sessions between shifts, and our support line shadowed the client's team for the first month live.
Inside the Migration
Trading Through the Whole Move
Every cutover landed inside its overnight window. Ordering stayed up through the entire quarter, month-end reports now reconcile the same day, and the client's team handles routine changes without calling us.