Legacy modernization
Legacy modernization that does not break production.
Modernizing an old system is rarely a single jump. We design a path with reversible steps, where every stage can be rolled back if something surprises us.
Typical starting points: a monolith grown over years, a library in support mode, undocumented customizations, or a system whose original team has long left. Modernization is not a rewrite from scratch.
How we modernize without breaking production
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Inventory and risk map
We identify together which parts of the system are business-critical, which are maintenance debt, and which can be removed entirely.
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Strangler-pattern migration
We add new functionality on top of the modern stack and migrate old functionality piece by piece. In practice, the system never lives as two systems.
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To production, reversibly
Every phase is designed to be rollback-able. We use feature flags, canary releases, and shadow traffic.
Tech stack
- Go
- PostgreSQL
- Terraform
- AWS
- Azure
- Datadog
- Feature flags
Frequently asked
How long does a typical modernization take?
Six to eighteen months, depending on system size. We aim for the first benefits to show up within the first two months.
Can we keep building features during modernization?
Yes, and that is often important. The plan accounts for parallel feature work; modernization should not stall it.
What if the system is so old that continuing is not worth it?
We will say so directly. Sometimes a clean rewrite is the right answer, and the consulting phase will reveal whether that is the case.
Modernization is risk management as much as it is building new things. We recommend the path you can actually deploy.
Get in touch
Start with a calm conversation.
Call, email, or grab 30 minutes from our calendar. We reply within one business day.