For teams running aging systems
Our critical software is old, fragile and understood by almost nobody.
Modernise in stages: assess the risk, stabilise the system, then replace capabilities one at a time while the business keeps running.
The risks of leaving it alone
Legacy software is not a problem because it is old. It becomes one when change is risky and knowledge is thin.
Unsupported platforms
Runtimes and frameworks no longer receive security fixes, and hosting options narrow.
Key-person dependency
One or two people understand how it works, and they may leave.
Changes take months
Even small requests need long testing because nobody trusts side effects.
It cannot connect
No usable API makes integrating modern tools slow and brittle.
A staged route to modern software
Assess
We review code, data, infrastructure and operations, and rank risks by business impact.
Stabilise
Backups, monitoring, access control and a test safety net come before change.
Find the seams
We identify parts that can be separated and replaced independently.
Replace one capability at a time
Each new module goes live next to the old one, with data kept in sync.
Retire the old
When a part is fully replaced and verified, it is switched off and archived.
Rewrite or modernise gradually
| Full rewrite | Staged modernisation | |
|---|---|---|
| Business risk | Concentrated at cutover | Spread across small releases |
| Time to first value | Late | Early, per capability |
| Knowledge capture | Often lost in the gap | Documented as each part is replaced |
| When it fits | Very small or truly unsalvageable systems | Most business-critical systems |
- Assessment before any commitmentYou get a written risk and options report.
- Business keeps runningChanges are staged and reversible.
- Knowledge written downUndocumented rules become documentation and tests.
Typical timeline
Typical durations for this kind of work. Real timing depends on scope, integrations and how quickly decisions are made.
Assessment
2 to 4 weeks
Code and infrastructure review and a staged plan.
Stabilisation
2 to 6 weeks
Backups, monitoring, access and baseline tests.
Staged replacement
Months, in releases
One capability at a time; total length depends on system size.
Questions about legacy modernisation
Will we have downtime?
We plan to avoid it. New modules run alongside existing ones, and switchovers are scheduled for quiet periods with a way back if something fails.
Can you work with a language or platform that is no longer common?
We assess that first. If we lack the right skills, we say so. Often the data and the business rules matter more than the original language.
What if there is no documentation?
That is common. We reconstruct behaviour by reading code, observing the system and interviewing users, and we record what we learn as documentation and automated tests.
Do we need to move to the cloud?
Not necessarily. Hosting is a separate decision. We help weigh managed cloud against your own servers, based on cost, data location and operations.
Services that deliver this
- Custom software developmentBespoke business software built from your domain rules, with clean architecture, documented APIs and a delivery process you can inspect each week.
- Software maintenanceOngoing maintenance for web and mobile products: updates, monitoring, bug fixes, performance work and takeover of software built by other teams.
- API integrationsReliable integrations between CRMs, ERPs, payments, ads and internal systems with retries, idempotency, monitoring and clear error handling.
- Web developmentCustom websites, operational portals and web applications built on an architecture that fits your business, from content model to deployment.
Is your system a risk or an asset?
Tell us what it does and how old it is. We will say what an assessment would cover.
Tell us about the system
What does it do, what is it built with, and what do you worry about? Approximate age and users help.