When is AI-assisted modernisation the right approach?

When you have a working legacy application with real business value, current documentation gaps, and a desire to evolve it without a full rewrite. We use architecture and specifications to capture intent, then modernise incrementally.

How do you avoid the usual rewrite failure modes?

We start by mapping the existing application — code, data, integrations — and produce specifications before any agent writes new code. Modernisation runs against those specifications, with traceability back to the original behaviour.

Can you work on a system we built in another language or stack?

Yes. The delivery model is stack-agnostic. The constraints come from your architecture, not ours.

Offerings

Modernisation · AI-assisted delivery

Application Modernisation

Legacy systems holding you back. We help you modernise — re-platforming, re-architecting, or incrementally rewriting with AI-assisted delivery.

What it is

Structured progress on legacy systems.

Legacy systems accumulate over time. They were built for a different set of requirements, on a different stack, by teams that have moved on. Modernising them is necessary — but doing it badly is expensive and risky.

Application Modernisation is a structured engagement that takes a legacy application and moves it forward. We use AI-assisted delivery to accelerate the work, with architecture governance to ensure it does not create new technical debt in the process.

Modernisation patterns

The right pattern for your situation.

Re-platform

Move the application to a modern infrastructure or runtime without changing the behaviour. Lower risk, faster, but limited long-term benefit if the architecture is fundamentally broken.

Re-architect

Restructure the application's internal organisation — decoupling components, clarifying boundaries, reducing coupling — while preserving the running system. The most common pattern for applications that work but are slow to change.

Incremental rewrite

Replace the application piece by piece, running old and new in parallel. The slowest pattern but the safest for mission-critical systems with no acceptable downtime window.

How AI-assisted delivery changes this

High-volume, well-understood work is where agents compound.

Modernisation has historically been expensive because it is high-volume, low-ambiguity work: a lot of code to write, most of it well-understood. This is exactly where AI-assisted delivery compounds. Agents work from specifications; specifications describe the target behaviour; the gap between current and target gets closed systematically.

We govern this process with architecture checkpoints, specification reviews, and human decision gates at the moments that matter.

What you get

A phased path forward with reversibility at each step.

Architecture assessment and pattern recommendation
A clear call on which modernisation pattern fits your application — with the evidence behind it.
Phased delivery plan
Explicit reversibility at each step. No big-bang rewrites — each phase delivers working software.
Working software
Delivered in the agreed pattern, against agreed done criteria.
Architecture and specification artefacts
Permanent deliverables. The decisions and structure that came out of the engagement, owned by you.

Who it is for

Organisations ready to move forward.

Organisations with legacy applications that are blocking growth, creating maintenance cost, or preventing adoption of modern delivery practices.

Questions

Frequently asked

When is AI-assisted modernisation the right approach?: When you have a working legacy application with real business value, current documentation gaps, and a desire to evolve it without a full rewrite. We use architecture and specifications to capture intent, then modernise incrementally.
How do you avoid the usual rewrite failure modes?: We start by mapping the existing application — code, data, integrations — and produce specifications before any agent writes new code. Modernisation runs against those specifications, with traceability back to the original behaviour.
Can you work on a system we built in another language or stack?: Yes. The delivery model is stack-agnostic. The constraints come from your architecture, not ours.

Keep exploring

Next step

Tell us about the application. We'll tell you which pattern fits.

A short call is enough to scope the engagement and identify which modernisation pattern fits your situation.

Talk to Consid