Financial Services
Systems built for environments where auditability, resilience and regulatory reporting are the design constraints.
Solution
Application Modernisation
We modernise business-critical applications in place — reducing risk, cost and change-lead-time without a big-bang rewrite that stops the organisation for a year.
“A critical system still works, but it is expensive to change, hard to hire for, and increasingly a security concern.”
01Overview
How we think about it
Legacy systems are rarely replaced because they stopped working. They are replaced because the cost of changing them exceeded the value of changing them, and because the people who understood them retired.
The default proposal is a rewrite. It is also the option with the worst track record: an eighteen-month project that must reach feature parity with a system nobody fully documented, during which the business cannot change either version.
We use incremental replacement instead. Put a stable interface in front of the legacy system, move one capability at a time behind it, and route traffic gradually. The old system shrinks until it can be switched off — with no weekend cutover and a rollback available at every step.
02The problem
What is going wrong today
Change lead time
Small modifications take months because impact cannot be predicted and there are no tests to catch regressions.
Knowledge concentration
One or two people understand the system, and the documentation is the code itself.
Security and compliance exposure
Unsupported runtimes and dependencies that can no longer be patched.
Integration resistance
No usable interface, so every connection is a bespoke extract that becomes another dependency.
03The approach
What we put in place
Assessment and mapping
What the system actually does today, which parts carry business value, and what is dead code nobody calls.
Interface layer
A stable API in front of the legacy system so consumers stop coupling directly to its internals.
Incremental replacement
Capability moved behind the interface one domain at a time, highest-risk first, each fully tested.
Traffic migration
Gradual routing with parallel-run reconciliation, and a rollback path retained at every stage.
Decommission
The legacy system is retired only once nothing calls it — verified by traffic, not by assumption.
04Outcomes
What good looks like
Typical results across engagements of this type. Yours will differ — these are the numbers we scope against, not promises.
Zero
Big-bang cutover events
60–80%
Reduction in change lead time
Supported
Runtimes and dependencies restored
Per-domain
Rollback available at every step
Recognise the problem? The assessment tells you what fixing it takes.
Book a technical assessment06Industries
All industriesWhere it applies
Manufacturing
Connecting the plant floor to the systems that plan it — production data, quality and maintenance in one operational picture.
Healthcare
Clinical and administrative systems built to the standards the sector requires — interoperable, auditable and designed for clinical workflow.
Logistics & Supply Chain
Visibility and control across the movement of goods — from warehouse operations to last-mile delivery.
07Questions
What clients ask first
Next step
Does this sound like your situation?
A fixed-price assessment will tell you what it takes to change it — scope, sequence and cost, before you commit to anything.