An application needs modernising when it holds the business back
Releases take weeks, it only scales by buying a bigger server, failures need someone to log in and fix them by hand, and the platform it runs on is out of support or out of people who understand it.
- Releases are slow and risky, so changes get batched and deferred.
- The application cannot scale horizontally, or scales only by over-provisioning.
- Operating system, runtime, framework or database is at end of support.
- Recovery, patching and failover are manual, and the knowledge sits with one or two people.
- One team’s change blocks another’s, because everything ships together.
- The application has to move off hardware, a data centre or an unsupported platform.
Modernisation goes wrong when the target is chosen before the application is understood
So we assess, then decide per application — including the option to leave it alone.
We look at what the business actually needs from it, its performance and availability requirements, its cost ceiling, the state of the code and the data layer, its dependencies, and what your team can realistically operate. Then we choose a path: containerise and keep it as one deployable, break out specific capabilities as services, move event-driven parts to serverless, put it on a managed application platform, or retire and replace it.
They solve an organisational problem
Independent teams releasing independently. If you do not have that problem, splitting a monolith usually produces a distributed one, which is harder to operate and slower than what you started with.
We recommend it when the evidence supports it, and a well-structured containerised application when it does not.
You cannot safely change what you cannot measure
The application containerised, with a defined base image, configuration externalised and no state on local disk.
Kubernetes where the estate justifies it, a managed container or application platform where it does not, serverless for event-driven and spiky workloads.
Self-managed components replaced with platform services — object storage, managed databases, queues and messaging, caching, CDN — where the operational saving is worth the cost and the coupling.
Health checks, automated restart and replacement, horizontal scaling, multiple availability zones, and backup and recovery that has been tested rather than assumed.
Metrics, structured logs and traces are put in place before anything is restructured. You cannot safely change what you cannot measure, and it is what proves the modernised version is actually better.
Environment separation, a branching model and a pipeline that builds, scans and deploys it.
In slices, not in one release
A full rewrite with a single cutover date is the most common way modernisation fails. We put a routing layer in front of the existing application and move one capability at a time, so each step is small, observable and reversible, and the old and new run side by side until the old one has nothing left to do.
Each slice goes to production and stays there. Nothing is built as a demonstration.
We are infrastructure and platform engineers, not a software house
We do the architecture, the platform, the packaging, the delivery pipeline and the operational work, and we make the smaller code and configuration changes that modernisation requires directly — container entrypoints, configuration and secrets handling, health endpoints, replacing a self-managed dependency with a platform service.
Where business logic has to be rewritten, your developers do it and we work alongside them: we define what has to change and why, review it against the target architecture, and build everything around it.
That division is deliberate. Your team knows the domain, and we would rather tell you that than discover it halfway through.
Four ways in
Modernisation assessment
Your applications reviewed against business requirements, cost and operational reality, with a recommended path and sequence for each, and the code changes your developers would need to make.
Single application
One system modernised end to end, from assessment to production and decommissioning.
Programme delivery
An application portfolio done in slices, alongside your development teams.
Second opinion
An in-flight modernisation or a proposed target architecture reviewed before you commit to it.
Which application is causing you the most trouble?
Tell us which one, and why. We will tell you what we would change, and whether it is worth doing.
- A documented decision per application: the path chosen, the reasoning, and what we advised against
- The modernised application running in production, deployed from code
- Baseline and post-change measurements against the goals agreed at the start
- Runbooks, architecture documentation and a handover your team can operate
- The legacy platform decommissioned, not left running alongside