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Case Study 06Enterprise IT · Digital Transformation
Legacy Application Modernisation
A business-critical legacy application needed a phased modernisation path that protected continuity while reducing operational risk.
Application ModernisationAPIsIntegrationQA
MicroservicesAPIRe-engineeringRelease Planning
3 phases
Risk-managed rollout
0 freeze
Business continuity window
1 backlog
Shared delivery plan
The challenge
The legacy system still carried critical processes, so a big-bang rewrite was too risky and incremental change lacked a clear architecture target.
Our approach
- Mapped process-critical journeys and integration dependencies.
- Defined a phased modernisation sequence with coexistence rules.
- Delivered APIs, UI replacement and regression controls in controlled releases.
Results
- Modern components replaced high-risk areas without stopping the business.
- Teams gained a shared backlog and architecture direction.
- Operational risk reduced as undocumented workarounds were retired.
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