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Legacy .NET modernisation

The system works, but every change takes longer and costs more.

An application that has been running for ten years is usually not the problem in itself — the problem is that nobody wants to touch it. Changes take longer, deployments make people nervous, and hiring engineers willing to work on the old stack keeps getting harder.

We start by understanding the business logic captured in the existing code, because that is where the real value sits. Only then do we propose a modernisation plan — broken into stages, each of which can be deployed on its own and rolled back if something goes wrong.

What you get

Audit and risk map

An assessment of architecture, dependencies, test coverage and critical areas. Including an answer on what is better left alone.

A staged modernisation plan

Work sequenced so that the system is deployable after every stage and the business benefit shows up early.

The migration itself

A move to .NET 10+, cleaned-up layering, containerisation and deployment automation — the exact scope agreed after the audit.

Securing the knowledge

Documentation and tests covering the key business rules, so the system stops depending on what individual people remember.