Solution
Modernise Legacy SystemsWithout the Big-Bang Cutover
A legacy modernisation engagement for systems that still run the business but cannot keep up — phased migration, data preserved, integration points named, cutover planned so the operation does not stop on a weekend.
What this engagement covers
Legacy modernisation starts with the audit — the system, the data, the integration points, the riskiest parts. Between that first audit and the first migration, the work is the migration plan, the data plan, the cutover plan and the first module.
We do this as a series of focused migrations, each one aimed at the next piece the team needs. The output is a modernised system, a confident team, and a backlog of small migrations that compound.
How the work is shaped
The first two weeks are the audit — a written assessment of the system, the data, the integrations and the migration path. The next two weeks are the first migration plan — a written plan with named owners, a test cut, a parallel run and a recovery path.
The remaining weeks are the first migration, with the old system running alongside the new. The next engagement is the next module, scoped against the team feedback and the operations metrics.
- A written audit and a written migration plan within the first four weeks.
- Each migration tested with a small subset of records before the cutover.
- Each cutover staged, with a named on-call and a rollback path tested.
- A 30-day post-migration review with the operations feedback and the next module scoped.
What it costs and what you get
A typical legacy modernisation engagement lands between ₹8 lakh and ₹40 lakh per phase, depending on the system and the migration scope. The engagement is fixed scope, with a change process for anything that moves.
You get the audit, the migration plan, the data plan, the cutover plan and the first migration. The audit is yours, the plans are yours, the migration is in your codebase, and the runbook is the one your operations team can use.
Frequently asked
The questions the team asks
- Will the operation stop during the migration?
- No, when the migration is planned. The old system runs alongside the new, with the data flowing through both, and the cutover is staged — one module at a time, with a named on-call and a rollback path tested. The cases where the operation stops are the ones without a written cutover plan, not the ones with one.
- How do you migrate the data without losing records?
- A written data migration plan with named owners, a test cut with a small subset of records, a parallel run for at least one full business cycle, and a recovery path that does not require restoring the legacy system. The old system is decommissioned in its own time, after the new one is trusted in production.
- What if the legacy system has no API?
- We wrap it. A modern API in front of the legacy system lets new code call the old system as if it were modern, and gives us the seam to migrate the underlying module without changing the consumer. When the module is migrated, the wrapper is updated or removed in its own time.
Have a project in mind?Let’s scope it together.
Tell us the outcome you need. You get an approach, a rough timeline and next steps within one business day.