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From Legacy to Cloud Agility: Banking Reimagined
Unison helped a prominent government-linked bank modernize legacy mainframe systems to a scalable cloud-native architecture—improving performance, cutting costs, and paving the way for open banking innovation.
From Legacy to Cloud Agility: Banking Reimagined
Client / Department
The client was the Technology Architecture team of a leading government-linked bank. Their core banking systems were running on expensive mainframe setups with aging COBOL code and limited integration capabilities. The team faced challenges with system scalability, rising hardware investments, and difficulties integrating with digital channels. Retention of legacy knowledge was also becoming a risk, prompting the need for a robust modernization strategy.
Problems
Legacy mainframe systems created multiple roadblocks in agility and innovation.
- High operational and maintenance costs
- Limited scalability with expensive hardware requirements
- Aging COBOL codebase with knowledge attrition
- Inefficient integration with digital channels
- Risk of system bottlenecks and single points of failure
Solutions
A phased modernization strategy bridged legacy and cloud systems efficiently.
- Rewrote key applications for cloud-native environments
- Introduced an API gateway to enable legacy integration
- Created a secure mainframe-to-cloud data synchronization model
- Gradually migrated workloads to AWS ECS
- Implemented DevOps pipelines for continuous deployment
Technology Stack
We employed a reliable, modern tech stack to ensure future-proofing and compliance.
Apache Camel
Spring Boot
PostgreSQL, Redis
AWS ECS
Kong API Gateway
MuleSoft
IBM WebSphere
Achievements
The modernization program yielded measurable results and set the stage for digital innovation.