Legacy modernization
Aging systems replaced piece by piece, with the business running the whole time. No big-bang rewrite, no weekend everyone dreads.
What it covers
- Assessment of what the old system actually does, including the undocumented parts
- A migration order that reduces risk rather than chasing the fun parts
- Strangler-style replacement, module by module
- Data migration with verification on both sides
- Old and new running in parallel until the new one is trusted
- Documentation written as the work goes, not after
How it works
Assess honestly
We find out what the system really does, including the behaviour nobody documented and everybody depends on.
Replace in pieces
One module at a time, with the old and new running together until the new one has earned the traffic.
Retire it
The old system is switched off only once nothing points at it, and the data has been verified on the other side.
Who it is for
Companies depending on a system nobody wants to touch, and who cannot afford to stop while it is replaced.
Questions we get
Do we have to stop while you replace it?
No. Old and new run in parallel and modules move across one at a time, so the business keeps running through the work.
What about the behaviour nobody documented?
Finding it is the first part of the job. The assessment covers what the system really does, including the parts everyone depends on and nobody wrote down.
When does the old system get switched off?
Only once nothing points at it and the data has been verified on the other side. Retiring it early is how migrations turn into incidents.