Legacy modernization. Replace the old system one safe step at a time.
We move business-critical systems off ageing technology in stages, running old and new side by side until the new one has proven itself.
For organizations running on software that is hard to change, hard to hire for or no longer supported.
Legacy modernization
We map what the legacy system really does, including the undocumented parts, then carve it into pieces that can move one at a time. Each step ships behind a switch, with monitoring and a rollback path, so the business never depends on a single risky cut-over.
- (01)Staged migration, no big bang
- (02)Old and new run side by side
- (03)Monitoring and rollback at every step
- (04)Knowledge captured as documentation
Tools we use for this.
- Strangler-fig migration
- APIs
- PostgreSQL
- Docker
- Feature flags
- Observability tools
We choose the stack that fits your requirements. Tool names describe our skills, not partnerships.
Build & Support.
Staged, ongoing.
We keep building after launch and look after the system in production.
Included
- (01)Legacy system mapping
- (02)Migration plan and priorities
- (03)Staged rebuild
- (04)Data migration and checks
- (05)Monitoring and rollback
- (06)Documentation
Not included
- (01)Licences for old or new systems
- (02)Parallel running costs
- (03)Business process redesign beyond the agreed scope
How it runs
- (01) · Weeks 1–2
Map
What the system does, who depends on it and what breaks if it stops.
- (02) · Per stage
Migrate in stages
Each piece rebuilt, tested and switched over safely.
- (03) · Per stage
Retire
Switch off the old component once the new one is proven.
Also available as: Workshop (½–2 days). Compare the formats.
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Why not rewrite everything at once?
Big-bang rewrites are where modernization projects fail. A staged migration keeps the business running and lets you stop or change course.
How long does it take?
It depends on the system. The mapping phase produces a staged plan with a price for the first stage.
What about the data?
Data moves with each stage, with checks that old and new agree before the old path is switched off.