Monolithic to Microservices for a Leading Retail Bank in Canada
At a glance —
the essentials.
Leading Retail Bank in Canada
- A leading retail bank in Canada operated a Loan Origination and Processing System built on a monolithic JEE architecture. Every change to the application required full regression testing of the entire system, creating significant overhead with each release. Memory leaks in any single module brought down the entire application, and troubleshooting issues had become increasingly difficult due to the sheer size of the codebase. The monolithic nature of the system was limiting the bank's ability to scale, maintain, and evolve the platform.
- Decomposed the monolithic Loan Origination and Processing System into multiple functional units, each developed as an independent microservice using Java Spring Boot
- Red Hat OpenShift container platform used for deployments, with CI/CD pipelines and automation test scripts developed to test each microservice independently
- Architecture enabled individual teams to own, develop, and maintain separate services without impacting the rest of the application
- Each microservice independently deployable — changes no longer impact the entire application
- Memory leaks isolated to individual services, eliminating full application downtime
- Each service scalable independently based on demand
- DevOps and Agile practices reduce development and deployment timelines
- Automated CI/CD pipelines with test scripts for each microservice
From monolithic bottleneck to independent, scalable microservices.
A leading retail bank in Canada partnered with Kumaran to transform their monolithic Loan Origination and Processing System into a modern microservices architecture. The engagement decomposed a complex JEE monolith into independently deployable Spring Boot services, containerised on Red Hat OpenShift with full CI/CD automation. The result was a platform where individual teams could develop and release changes to their services without triggering full regression cycles or risking system-wide outages — a fundamental shift in how the bank could deliver and maintain its core lending operations.
The Background
The bank's Loan Origination and Processing System had been built as a monolith on the JEE stack, accumulating complexity over years of development. Every code change required end-to-end regression testing, memory issues in one module could bring the entire platform down, and the size of the codebase made troubleshooting slow and expensive. As the bank's lending operations grew and change frequency increased, the limitations of the monolithic architecture became a critical constraint on delivery speed and system reliability.
Want to know how we achieved these results?
Contact us today to learn more about our microservices transformation approach and the success story behind this engagement with a Leading Retail Bank in Canada.
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