Legacy System Modernization
Every legacy system was the right decision once — until the plugin stack became unmaintainable, the original developer left, or the platform simply stopped being able to do what the business needed. runIT has done this migration in practice, not just in theory: moving Fizyofactory from a plugin-heavy WordPress install to Next.js, and rebuilding Mayday International's entire platform from a visual page-builder (Webflow) to a codebase the team can actually extend. Modernization isn't a rewrite from a blank page — it's mapping what the old system actually does, including the undocumented edge cases nobody remembers deciding on, and rebuilding it on an architecture that won't need the same rescue again in three years.
What's included
A full audit of the existing system's real behavior, including undocumented edge cases the original build never wrote down.
A migration plan with a rollback path, so a modernization project never becomes a one-way door.
Data and content migration mapped field by field, not a bulk export that quietly drops edge cases.
A cutover plan built around the client's actual uptime requirements, from a scheduled maintenance window to true zero downtime.
Why runIT
We've done this exact migration on real, live client platforms (Fizyofactory: WordPress to Next.js; Mayday International: Webflow to Nuxt) — this is documented, shipped work, not a theoretical service line.
We treat the old system as a specification to preserve, not a design to discard — the goal is a more maintainable version of what the business actually relies on, not a reimagining that quietly breaks a workflow someone depends on.
For SEO-relevant migrations (site rebuilds), URL and redirect mapping is planned before a single line of the new system ships, so rankings survive the move instead of resetting.
As smooth as a software deploy.
Sprint-focused, transparent, measurable. You see what we do at every step.
Brief & Strategy
We clarify goals, users and technical constraints. Work begins on day one.
Design & Architecture
UX flows, system architecture and data models run in parallel.
Build & QA
CI/CD pipeline live in the first week. Automated tests, code review, observability — by default.
Ship & Grow
Post-launch SEO, performance and analytics keep growth compounding.
This same system, shipped before.
Pilates Rehberi and Pilates Studios UK are live examples of the programmatic-SEO local-directory system you're looking at right now — built, launched and ranking.
Frequently asked questions
How do you make sure nothing breaks during a legacy migration?
By treating the existing system as the specification. Before writing any new code, we map what it actually does today — including the edge cases nobody documented — then rebuild against that map with a tested rollback plan, so if something doesn't match after cutover, we notice immediately rather than a week later.