Code & architecture audit
A clear report on risks, dependencies, security issues and options, with costs, before anything changes.
Legacy software modernization
Modernize the system your business can’t switch off
Old systems keep businesses running long after the people who built them have moved on. We upgrade, re-platform or gradually replace them, module by module, while the old system keeps working until the new one has proved itself.
What we do
Modernization, matched to the system
Framework & runtime upgrades
Out-of-support versions brought current: .NET Framework to .NET, Java 8 to current LTS, AngularJS to Angular or React, PHP 5 to 8.
Re-platforming
From ageing servers to containers and managed cloud services, with the DevOps to run them.
Monolith to modules
Carving a large system into well-defined modules or services, one boundary at a time.
Data migration
Database upgrades and moves with validation, reconciliation and a rehearsed cut-over plan.
Niagara AX to Niagara 4
Station migrations with custom modules rewritten for Niagara 4, part of our building automation specialty.
Choosing the path
Retain, upgrade, re-platform or rebuild?
| Option | When it fits | Risk | Effort |
|---|---|---|---|
| Retain & stabilise | The system works and changes rarely; it just needs to be safe | Low | Low |
| Upgrade in place | The design is sound but the stack is out of support | Low to medium | Medium |
| Re-platform | Hosting or operations are the real pain | Medium | Medium |
| Rebuild step by step | The system blocks the business and must change often | Managed by doing it module by module | High, spread over time |
Our approach
No big-bang cut-overs
Big-bang rewrites fail for predictable reasons: the old system’s behaviour was never written down, the new one is late, and the business can’t wait. We avoid all three.
A routing layer sends each function to the old or new implementation. Modules move one at a time, are compared against the old system’s results, and the old part is retired only when the new one is proven.
- Behaviour captured firstCharacterisation tests record what the old system really does before we change it.
- Value earlyThe first modules go live in months, not after a multi-year rewrite.
- Always a way backEach step can be rolled back while the old path still exists.
Frequently asked questions
Nobody understands the old code any more. Can you still help?
Yes. Reading unfamiliar and undocumented code is a large part of modernization work; the audit produces the documentation you are missing.
Do we have to rewrite everything?
Rarely. Often an upgrade and a few targeted rewrites remove most of the risk at a fraction of the cost.
Will users notice the change?
Ideally only as improvements. Modules switch over behind the scenes, and interfaces change when there is a reason to.
What does a code review involve?
Access to the repository and a conversation with the people who run the system. The result is a written report with risks, options and estimates.
Running on software nobody wants to touch?
Tell us what it is, what it runs on and what worries you. An engineer replies within 24 hours.