Modernizing core banking infrastructure without disrupting 6 million customers
GlobalBank Financial Group (illustrative) — Banking
- Faster processing
- 42%
- Infrastructure cost
- 28%
- Release velocity
- 6x
Reduction in core transaction processing time
Reduction in annual infrastructure spend
Increase in deployment frequency
Overview
GlobalBank Financial Group needed to modernize its core banking platform to support new digital products, but a big-bang migration was too risky given the bank’s scale and regulatory obligations.
The Challenge
A 30-year-old mainframe core banking platform was limiting the bank’s ability to launch new digital products and was becoming increasingly costly to maintain.
- Mainframe expertise was increasingly scarce and expensive to retain
- New product launches were taking 9-12 months due to platform rigidity
- Regulatory reporting required manual reconciliation across disconnected systems
Our Approach
Discovery & Risk Mapping
Mapped every downstream dependency on the core platform before defining a migration sequence.
Strangler-Fig Migration
Incrementally routed traffic to new modular services while the legacy core remained the system of record.
Zero-Downtime Cutover
Executed final cutover in off-peak windows with full rollback capability at every stage.
The Outcome
The bank now deploys new capabilities in days rather than months, has cut infrastructure costs by more than a quarter, and retains full auditability across every migrated transaction.
“This was the most carefully sequenced migration our engineering organization has ever executed. Zero customer-facing incidents across an 18-month program.”
Chief Technology Officer
GlobalBank Financial Group
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