Replatform without freezing the business.
We migrate legacy apps onto a modern, maintainable stack incrementally — strangler-fig style — so the business never stops shipping.
The full rewrite is the most expensive lie in software. It promises a clean slate and delivers a year of feature freezes, dual maintenance, and political damage. We don't do those.
Instead, we use the strangler-fig pattern: route requests through a thin layer, replace one capability at a time, and retire the legacy system in pieces. The business keeps shipping. Risk stays bounded.
We've used this model on PHP monoliths, on .NET Framework apps, on aging Rails systems, and on hand-rolled stacks. The technology changes; the model holds.
The work, in plain language
No buzzwords. Each item below is something we'll do for you, in the order we'll do it.
- 01
Map the legacy system
Routes, data flows, integrations, dark corners — documented and risk-ranked. You see what you've actually got.
- 02
Define the target architecture
Pick a small, durable stack and design the routing layer that lets old and new coexist on the same domain.
- 03
Cut over by capability
Take the highest-leverage capability first. Ship it new, route a slice of traffic, and validate before going further.
- 04
Migrate data, never just code
Schemas, ETL, dual-writes, reconciliation. We treat data migration as a first-class engineering problem, not an afterthought.
- 05
Keep the lights on
We patch the legacy system as needed during the migration. Operations is part of the engagement.
- 06
Retire the old system loudly
Decommission ceremoniously: archive code, snapshot data, kill DNS, document the wake. The system is done.
What lands in your repo
- Legacy assessment & risk register
- Target architecture document
- Migration plan with capability cutover map
- Routing / proxy layer in code
- New application(s) on a modern stack
- Data migration & reconciliation tooling
- Cutover runbooks and rollback plans
- Decommissioning report
Who this fits
- Teams running on EOL frameworks
- Apps with no automated tests or deploys
- Businesses where downtime is unacceptable
- Companies preparing for an acquisition
- Engineering leaders inheriting a monolith
- Operations teams paying SaaS to avoid the legacy
Replatformed a 12-year-old dispatch app in 9 weeks with zero downtime
We migrated a legacy PHP dispatch tool to Next.js + PostgreSQL on AWS using a strangler-fig routing layer. Daily deploys replaced monthly ones. The team retired the legacy stack the following quarter.
- Total migration
- 9 wks
- Deploys per week
- 30x
- Lost workdays
- 0
Things people ask before signing
If your question isn't here, send it our way and we'll answer plainly.
Most first-slice cutovers take 8–12 weeks. Full retirement of the legacy system is usually 6–12 months, depending on surface area.
Ready when you are
Let's build something durable.
Tell us about your goals. We'll respond within one business day with next steps.