UHM Tech · April 22, 2026
Full rewrites fail when the old system still holds the only accurate history. A safer pattern is to put a stable API in front of what exists, then replace modules behind that API.
Find the seams
Identify bounded workflows: quoting, fulfillment, billing, reporting. Replace one seam at a time and keep dual-running only as long as you can reconcile.
Users need a better daily path, not a new database they must update twice.
Do not freeze the business
Modernization programs stall when every change waits for the perfect target architecture. Ship the next module with tests and a rollback.
UHM Tech treats legacy work as product delivery with an explicit strangler path.