Legacy Rebuild
Replatform core products with resilient architecture, enhanced UX, and updated APIs.
Read moreRisk Reduction
Legacy Migration
Legacy systems are rarely replaced in one move, and the attempts that try tend to become the cautionary tale. Staged migration takes functionality out in slices behind a stable interface, so value lands early, risk stays bounded, and you can stop at any point without being stranded.
When this helps
You are probably reading this because of one of these.
- The system is business-critical and nobody remaining built it
- Vendor support has ended or the platform is out of compliance
- Every change is quoted in months because of unknown side effects
- A previous replacement attempt was abandoned partway
How we help
A delivery sequence, not a discovery phase that never ends.
Every stage produces something you can act on independently, so the engagement can stop at any point without leaving you stranded mid-programme.
Stabilise
Add monitoring, backups, and a test harness around what exists, so the system stops degrading while we plan.
Slice
Identify seams in the functionality and sequence them by business value against technical risk.
Strangle
Route traffic slice by slice to new services behind a facade, with old and new running in parallel until proven.
Retire
Decommission deliberately: archive data, revoke access, cancel licences, and document what was switched off.
Efficiencies driven
The measurable change this engagement is aiming at.
Where teams usually start
- Undocumented behaviour discovered only when it breaks
- All-or-nothing replacement risk
- Licences and access lingering after go-live
Where the engagement leaves you
- Behaviour captured in tests before anything moves
- Bounded risk, with value landing at every slice
- A documented decommissioning trail
Slice
By slice, not big bang
Parallel
Old and new until proven
Evidenced
Data reconciliation per stage
What you receive
Artefacts that outlive the engagement.
- Behavioural test harness capturing what the system does today
- Sequenced slice plan ranked by value against risk
- Facade or routing layer enabling incremental replacement
- Data migration with reconciliation evidence for each slice
- Decommissioning record covering data, access, and licences
Next step
De-risk a legacy system.
A short call is usually enough to work out whether this is the right engagement, and what it would cost. If it is not, I will say so.
Engagement
Risk Reduction
Slice by slice