Modernising a system without stopping the business
Incremental replacement of a platform that has outgrown itself — and an honest answer on whether it needs replacing at all.
What you get
- Codebase and architecture assessment
- Incremental migration plan
- Strangler-pattern implementation
- Data migration and reconciliation
- Parallel-run and cutover plan
What changes
- Features keep shipping during the migration
- Each step is separately revertible, so no phase is a cliff
- The old system is switched off on evidence, not on a date
When teams call us
- A platform where every change risks breaking something else
- A stack whose framework version is past end of life
- A rewrite proposal nobody can estimate honestly
Process
How the work runs
The same four phases whichever engagement model you pick, each ending in something you can read.
Assessment
A read on the current system — what is load-bearing, what is dead, and whether it needs replacing at all.
- Dependency map
- Risk register
- Honest recommendation
Incremental plan
A route that keeps the business running. Big-bang rewrites are how migrations become two-year projects.
- Phased slices
- Rollback at each step
- No feature freeze
Migrate
Slice by slice behind a facade, with the old and new paths running together until the new one is trusted.
- Parallel run
- Data reconciliation
- Traffic shifting
Decommission
The old path removed once it is genuinely unused — verified from traffic, not from memory.
- Usage evidence
- Cost reduction measured
- Docs updated
Legacy Modernization, specifically
The questions that come up on this work in particular.
Still have a question? Talk to the team
Not sure which service your project needs?
Most useful projects cross two or three of them. Describe the outcome and we will map it.