UNIVERSAL · STAGE 05
Digit Modernise migrates legacy systems to a modern web stack - incrementally, with the old and new running side-by-side until the new one earns its place. Up to 90% less migration time than a traditional rip-and-replace. The business does not stop. The team does not lose sleep.
Every mid-market operation has at least one piece of software that should have been replaced years ago. Excel-based core processes. A bespoke admin tool from 2007 that runs on a single server in a cupboard. A legacy ERP module nobody dares touch.
The reason it stays is rational: a "big-bang" replacement project is high-risk, expensive and almost always slips. Better the legacy you know than the rebuild that takes the business down for a quarter.
Digit Modernise is the antidote to that calculus. Strangler-pattern migrations, parallel running, feature-by-feature switchover. The old and the new live side-by-side until the new earns its place. Reversible at every step.
THE PATTERN
01
Map the legacy system: features, integrations, data dependencies, compliance posture. The 'as-is' before any 'to-be'.
02
Stand up the modern stack alongside the legacy. Both run; both read the same data.
03
Migrate features one at a time. Each migration is independently shippable and reversible.
04
Old and new run side-by-side, often for weeks. Output is compared until the team trusts the new system.
05
Decommission the legacy. Archive the data per your retention policy. Documentation handed over.
WHERE WE START
01
The mission-critical spreadsheet nobody else can edit.
02
The internal Java WebStart platform built before web frameworks existed.
03
The API layer held together by middleware nobody supports any more.
04
Replace the painful module without replacing the whole ERP.
AI-AUGMENTED MIGRATION
The strangler pattern is not new. What is new is the speed at which we can run it. AI-assisted analysis maps the legacy in days rather than weeks. AI-assisted code generation drafts the modern equivalents in hours rather than days. Engineers stay in the loop on architecture, security, business logic and the genuinely tricky calls - but the mechanical translation work that used to dominate a migration is now a fraction of the engagement.
This is vibe coding with senior engineers in the room, not unsupervised AI generation. The model proposes; the engineer verifies, edits, hardens. The 90% time saving is the difference between an engineer typing every line and an engineer reviewing every line.
AI reads the codebase faster than any team can - surfaces patterns, flags risks, drafts the migration map.
AI drafts the modern equivalents from the legacy patterns; engineers verify against business logic and security posture.
AI builds the regression suite alongside the migration. The new system has to pass the old system's tests before it goes live.
AI writes the docs as the migration runs. The handover artefact is a by-product, not an afterthought.
WHERE TO NEXT
PREVIOUS STAGE
Quiet Automation. Loud Results. Private-AI orchestration that takes the routine work off your team's plate.
Explore Digit Automate →OR START OVER
Listen Before You Build. Fixed-price discovery and specification - the right place to start when the next move is unclear.
Explore Digit Concept →READY TO MIGRATE
Thirty-minute discovery call. Bring the legacy; we will sketch the strangler path.
