Legacy Modernisation
Incremental migrations off systems that have stopped paying for themselves, using a strangler-fig approach rather than a rewrite that freezes the roadmap for a year. The lights stay on the whole time.
A strangler-fig migration replaces a legacy system piece by piece, behind a routing layer, while it keeps running — the opposite of a rewrite that freezes the roadmap for a year and bets the company on a single cutover date.
We prioritise by what's actually costing you money or sleep: the module nobody wants to touch, the integration held together by a script someone wrote years ago and left. The rest can wait, and often should.
You need this if
- —You're afraid to touch a core system because nobody fully understands it anymore
- —A full rewrite has been proposed and would take a year the business doesn't have
- —An old API or schema is blocking every new feature that touches it
What this covers
- Strangler-fig migrations
- API & schema redesign
- Zero-downtime cutovers
Typical stack
Questions
Is this always a full rewrite?
No — a full rewrite is usually the last option we would recommend, not the first. Incremental extraction behind a routing layer gets you most of the benefit without freezing the roadmap.
Can the old and new systems run at the same time?
That's the point of the approach — a strangler-fig migration routes traffic between old and new piece by piece, so the system keeps running the whole time instead of one high-risk cutover.
How do you decide what to migrate first?
Whatever is actually costing the most right now — in engineering time, incidents, or blocked features — rather than working top to bottom through the codebase.
Often paired with
At a glance
Let us build somethingworth maintaining
Tell us what you are building and what is in the way. You will speak to an engineer, not an account manager, and leave the call with a straight answer.
Typically replies within one business day · NDA on request