// services / legacy_modernisation

That system everyone's afraid to touch? We'll touch it.

Careful, incremental modernisation of the ageing systems your business depends on — without the big-rewrite gamble.

Every established business has one: the system nobody fully understands, written in something unfashionable, maintained by memory and fear. It still runs the business — which is exactly why "let’s rewrite it from scratch" is the most expensive sentence in software.

We modernise the other way: understand the system first, wrap it, and replace it piece by piece while it keeps running. New capabilities go into clean, modern services; the legacy core shrinks gradually until what remains can be retired without drama. Your business never stops trading while its foundations are replaced.

Pattern recognition is the job here — reading old code, old data and old workarounds to find the business rules buried inside, including the ones nobody remembers agreeing to. It happens to be the kind of deep, obsessive archaeology we’re built for.

// what we deliver

What we deliver

System archaeology & risk map

A clear-eyed audit of what the system does, what depends on it, where the bodies are buried, and a sequenced plan — before anyone writes a line of replacement code.

Incremental replacement

Strangler-fig migration: new services grow around the old system, traffic moves over route by route, and rollback is always possible.

Data migration & integrity

Decades of data moved, cleaned and reconciled — with parallel-running and verification, because "it looked fine in the demo" is not a migration strategy.

Stabilise-first rescue

When the system is actively on fire: backups, monitoring, documentation and critical fixes to buy breathing room before any modernisation begins.

// faq

Questions we're usually asked

Based in Cambridge and built for its economy of labs, devices and research-driven businesses — read more about software development in Cambridge.

// related

Web Applications

Bespoke web applications, customer portals and internal tools — built to replace the spreadsheets and stop-gaps holding your business together.

Mobile Apps

iOS and Android apps built around the thirty seconds your user actually has — not the demo that looks good in a meeting.

AI & LLM Integration

Practical LLM and machine-learning integration: document processing, triage, search and automation that pays for itself — with the hype filtered out.

Tell us the problem.

A short email is enough — what you do, what hurts, what you wish existed. We reply to every enquiry, usually within one working day.

Start a conversation

hello@overclockminds.co.uk