A rural bank core system that is hard to change, with high vendor lock-in
Solution case studies are scenarios based on common industry problem patterns. They do not refer to any client and are not MarkasDev project portfolio items. Our client portfolio is published separately.
Industry context
A regional rural bank depends on an old core system. New product requests wait for months. Vendor customisation is expensive and documentation is thin.
Constraints
- Regulatory reporting
- Cutover risk
- A small IT team
- Sensitive historical data
Approach
Diagnose
Map core capabilities against business needs; estimate the total cost of lock-in; compare improve, replace, and wrap options.
Deliver
An anti-corruption layer or API wrap for new products, or a phased migration programme if Diagnose concludes replacement is needed.
Operate
Monitor transaction integrity, apply strict change control, and rehearse cutovers.
High-level architecture
Strangler pattern: API facade, event sink, and new product modules outside the core.
Typical outcomes
Faster time to market for new products without a risky big-bang migration.
Typical or expected outcomes, not claims about MarkasDev project results.