Modernizing MINERVA CREDIT's card platform without service interruption

A regulated card business needed to move a core platform component from GeneXus 8 to 16 without disrupting authorizations, servicing, or downstream integrations. Eximus executed a phased modernization with rehearsal cutovers, transaction checks, and rollback planning to protect service continuity.

Client and context

The client runs a live card platform with strict availability requirements and limited tolerance for instability.

• Sector: Banking and financial services.
• Size: Mid-sized technology team supporting day-to-day card operations.
• Key systems: GeneXus 8 to 16, SQL Server, card-processing and back-office integrations.

Challenge

Upgrade a live card platform without interrupting customer-facing flows or increasing release risk.

• Legacy knowledge base with limited documentation.
• Tight cutover windows and zero appetite for downtime.
• Sensitive integrations with processors and back-office systems.
• Need for traceability for operations, risk, and internal stakeholders.

Our approach

We delivered a phased migration designed for continuity rather than a single high-risk cutover.

• Assessed KB objects, dependencies, and critical transaction paths.
• Built a parallel environment for rehearsal cutovers and smoke tests.
• Planned phased cutovers with fallback paths and validation checkpoints.
• Added automated checks around key card transactions and integrations.
• Coordinated deployment windows, communications, and rollback criteria with client teams.

Results

• Core platform module moved to GeneXus 16 without unplanned service interruption.
• Lower operational risk for future releases through better validation and rollback discipline.
• Improved stability and observability after migration.
• Runbooks and decision logs captured for future changes.

Tech & services used

• GeneXus 8 to 16, SQL Server, banking integrations.
• Service: GeneXus Modernization.

Lessons learned

• Rehearsed cutovers reduce risk on customer-facing financial platforms.
• Transaction-level smoke tests are essential when card operations cannot absorb hidden regressions.
• Clear rollback criteria speed approvals and reduce go-live tension.

Next step

If your card or lending platform must modernize without putting service continuity at risk, we can map the safest phased path. Contact us to discuss your migration.