Legacy System Modernisation for Product and Project Managers

We use strangler pattern refactoring: new microservices run alongside the monolith, routing traffic gradually as each service proves stable. Your users see no downtime, and you can roll back any service without affecting the whole system. The key is detailed dependency mapping upfront and careful sequencing of which services migrate first. We work with your ops team to define rollback procedures and cutover triggers that fit your risk appetite.

Data validation and integrity checks run throughout the migration, not just at the end. We perform dry runs first, reconcile records before the live cutover, and keep both old and new systems readable for a period so you can verify correctness. Your stakeholders need to see this plan before we start. That's why we always map data lineage and document any transformations or deduplication required by the new system.

Modernisation doesn't stop your other work. We plan migration in discrete increments sized to fit your sprint capacity, typically running as a parallel workstream with clear handoff points. Some sprints are 80% feature delivery and 20% migration; others shift toward migration as early phases complete. Your product manager owns the balance. We report progress in the same backlog and ceremony structure you already use.

Discovery gaps happen on older systems. We budget discovery time early, document dependencies as we find them, and flag where new dependencies emerge. If the scope shifts significantly, we surface it early in the sprint review so your stakeholders can decide whether to adjust the roadmap or extend the timeline. We don't hide surprises until go-live.

We provide metrics tied to what your board cares about: data migration completeness, system availability during cutover, service performance post-migration, and effort burned against plan. Monthly dashboards show which systems have moved, what was decommissioned, and what's left. We also flag any risks or scope changes so your PMO has early warning before it impacts the roadmap.

Yes, provided there's clear sequencing. We prioritize based on business criticality and technical dependencies so that early wins don't break downstream systems. You set the priority order based on revenue impact or operational risk; we sequence the technical work accordingly. Our team capacity allows parallel work on 2-3 systems without compromising quality on any of them.