Core Banking Module Modernization
Confidential — European Bank
Banking 80% faster deployments Zero downtime migration
Challenge
A mid-size European bank relied on a monolithic Java application for account management and transaction processing. Release cycles took 3-4 weeks, and any change risked system-wide outages.
Approach
We applied a strangler fig pattern — extracting account management into independent microservices behind an API gateway, while the legacy system continued handling remaining modules.
Results
- Deployment frequency increased from monthly to daily
- Zero downtime during the 14-month migration
- 40% reduction in incident response time
- Full audit trail maintained throughout transition
Technologies used
JavaSpring CloudKafkaPostgreSQLKubernetes