Your applicationsmodernized,without disruption.
Audit, migration plan, and progressive rebuild. We keep what works, replace what doesn’t, without freezing your progress or creating long-term dependencies.
Three principles,
that distinguish modernization from a rewrite.
An application slowing down your business doesn’t need to be discarded. It needs to be read, understood, and rebuilt piece by piece while operations continue.
Progressive migration
Old and new systems coexist until full switch-over. Your teams keep working while we modernize. No business interruption, no freeze on ongoing developments.
We reuse the existing, we don’t discard it
PHP, Java, .NET, Symfony, legacy Rails, Bubble, Airtable: we audit, extract what holds value, and rebuild what needs to be. No rewriting for the sake of it.
Handover to internal teams included
Documentation, code reviews, training. Our goal isn’t to become indispensable. You take back control whenever you want—it’s in scope, not an add-on.
Four modernization scenarios.
Four concrete cases with documented deliverables and production feedback. Not an abstract promise like “we can take over anything”—a defined scope we commit to.
Aging monolithic application
Outdated stack, heavy technical debt, no one knows how to evolve it anymore. We audit, plan, and replace it module by module—without breaking what’s running.
No-code tool that’s hit its limits
Bubble, Airtable, FlutterFlow can no longer handle the load or business rules. Switch to maintainable code without losing data or users.
SaaS stuck on an outdated stack
Product that runs but is becoming hard to maintain, evolve, or pass investor audits. Targeted reconstruction of critical modules.
Hard-to-maintain internal tool
Custom ERP, in-house back-office, business scripts accumulated over the years. We modernize without rewriting everything—we reclaim what holds value.
What we modernize toward.
Scroll’s standard target stack—modern, maintainable, and recruit-friendly. No exotic tech with no future. The source code returns to you, in your Git, with no permanent dependency on Scroll.
Front
Back / Data
AI / Agents
Auth
Ops / Hosting
Monitoring
JeRêveDuneMaison — from a rigid business app to a modern stack.
Mandate management application for property hunters, clients, and administrators. Gradual migration to Next.js + Supabase + PostgreSQL, full documentation, and comprehensive support. Coexistence of old and new systems until the final switch.
Read the full case studyFour steps, no big bang.
A dedicated team from scoping to delivery with a dedicated project manager.
The existing system, independently.
System mapping, identification of bottlenecks, technical debt assessment, success criteria. Deliverable: diagnosis + migration plan + estimate. 1 to 3 weeks.
The migration plan.
Which modules to keep, which to replace, in what order, with what coexistence. Validation with your IT and business teams before any development. No surprises along the way.
Module by module.
2-week sprints, delivery by modules. Your users switch over gradually, without disruption. Automated tests and monitoring from the first module in production.
Final switch and autonomy.
Decommissioning of the old system, team training, final documentation. Gradual handover to internal teams if desired — your IT takes back control before the contract ends.
What you get at the end.
A modernization is only successful if your teams take back control. The source code returns to you, your devs are trained, your legacy subscriptions are canceled. No point of no return.
Source code is yours
TypeScript reviewed, tested, documented. In your Git, under your license. Not a blob exported from a third-party tool.
Data preserved
Historical data recovery, integrity checked, migration documented. User history is never sacrificed.
Teams trained
Training sessions, pair programming, documentation. Your devs take back control before the contract ends. No permanent dependency.
Legacy decommissioned
The old system is gradually phased out, module by module, after each scope’s validated migration. No abrupt shutdown.
Frequently asked questions
The most common questions we get during scoping. If yours isn’t here, reach out!
Is your application holding your business back? Independent audit in 1 to 3 weeks.
75011 Paris