Overview
Modernise without a risky rewrite
Legacy systems often carry years of business rules that are not written down anywhere. A rushed rewrite loses them. We begin by understanding what the system does, then choose the safest route: rehost, refactor, replatform or rebuild.
Where possible we replace the system in slices, running old and new together until each part is proven.
Ideal for: Organisations running critical systems on outdated technology, with few people left who understand them.
What's included
System assessment
Code, data, risks and dependencies reviewed and documented.
Migration strategy
Rehost, refactor, replatform or rebuild, chosen on cost and risk.
Data migration
Mapping, cleaning, loading and reconciliation of historic data.
API wrappers
Expose old systems through modern APIs while you migrate.
Cloud migration
Move workloads to AWS, Azure or Google Cloud.
Parallel running
Old and new run side by side until the switch is safe.
Why choose us
Slice by slice
The strangler approach replaces one function at a time. Each slice goes live, is checked against the old behaviour, and the legacy system shrinks until it can be retired.
- Phased migration, no big-bang switch
- Business logic preserved and documented
- Move to supported, secure technology
FAQs
Questions before you start
Should we rewrite or refactor?
It depends on code quality, business logic and cost. An assessment gives a recommendation.
Will there be downtime?
We plan cut-overs to minimise it, often with parallel running.
What if nobody understands the old code?
We reverse-engineer the behaviour through code, data and user interviews.
Can we modernise in stages?
Yes. This is usually the safest path.
Did you know
Insights worth knowing
Document the business rules
They are the real asset.
Test against real data
Reconciliation proves equivalence.
Retire the old system deliberately
Do not leave two systems running forever.
Budget for data cleansing
Old data is rarely tidy.
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