GeneXus migration for credit card system MINERVA CREDIT

A financial services team needed to modernize a credit card module built on GeneXus 8 while keeping channels available. Eximus planned and executed the migration to GeneXus 16 with rehearsals and safeguards to avoid downtime.

Client and context

The client operates a credit card platform with strict availability requirements and regulatory oversight.

• Sector: Banking/financial services.
• Size: Mid-sized team with heavy dependency on the module.
• Key systems: GeneXus 8 (to 16), SQL Server, integrations with card processing.

Challenge

Upgrade without interrupting card operations or creating regressions.

• Legacy code with limited documentation.
• Zero tolerance for downtime during cutover.
• Complex integrations to external processors.
• Need for evidence for audits and internal stakeholders.

Our approach

We delivered a phased migration with tests and rollback options.

• Assessed KB, dependencies and external integrations.
• Built a parallel environment for rehearsals and smoke tests.
• Planned phased cutovers with fallback paths.
• Added automated checks around critical transactions.
• Coordinated deployments with client teams to align windows and communications.

Results

• Migration completed with no unplanned downtime.
• Improved stability and observability post-migration.
• Runbooks and decision logs documented for future changes.
• Stakeholders gained confidence in releasing further changes.

Tech & services used

• GeneXus 8 to 16, SQL Server, Azure DevOps for pipelines.
• Service: GeneXus Modernization.

Lessons learned

• Parallel rehearsals reduce risk for legacy GeneXus upgrades.
• Automated smoke tests around critical transactions catch regressions early.
• Clear rollback plans calm stakeholders and speed approvals.

Next step

If you need to upgrade GeneXus without downtime, we can review your KBs and map a phased plan. Contact us to discuss your migration.