Legacy system modernization
Evolving systems the business can't switch off: in stages, measurable and without freezing operations.
The problem
«We have a system that holds the business together and nobody dares to touch it.»
Legacy systems rarely fail all at once. They become slow to change, expensive to run and dependent on a few people. Rewriting them from scratch is tempting and is almost always the riskiest option.
What we do
Technical assessment
Architecture, code, dependencies, data and operations: what is fine, what is a risk and what to change first.
Step-by-step migration
We separate modules behind clear interfaces and replace them one at a time, with the original system still running.
Data and compatibility
Verified data migrations, periods where old and new systems run side by side, and a planned way back.
Performance and operations
Profiling, queries, caching, containers, continuous delivery and monitoring so the system becomes predictable.
When it makes sense
- Every change takes weeks and breaks something unexpected.
- The system depends on a language, framework or server that is no longer supported.
- You need to connect it with other systems and it has no way to do so.
- Infrastructure is expensive or fragile and nobody quite knows why.
What you get
A system you can change with confidence: automated tests, repeatable deployments and a roadmap that moves forward without stopping operations.
How we build it
Before changing code we didn't write, we cover it with tests that describe how it behaves today. Every stage of the migration can be rolled back, and the old system is switched off when it no longer receives traffic, not before.
We separated user identity from a monolith and turned it into a service shared by several products. Read the case
Frequently asked questions
Isn't it better to rewrite from scratch?
Almost never in one go. We prefer to replace it piece by piece with the original system running, because every step delivers value and can be rolled back.
Can you work on code you didn't write?
Yes, it is most of modernization work. We start by understanding it and covering it with tests before changing it.
Can you move us to the cloud or to Kubernetes?
Yes, when it makes sense for your operations and budget. We also design private Kubernetes platforms, so we know what they really cost to run.
Other services
- Custom software developmentInternal systems, platforms and APIs designed around how your company works, not the average case.
- Digital product developmentFrom the first version to a product real customers use, without rewriting it along the way.
- Applied artificial intelligenceLanguage models built into real processes, with evaluation, controlled costs and people in the loop where it matters.
- Data, integration and automationData that reaches the right place on its own: integrations, pipelines, automation and dashboards like Power BI.
Let's talk about your project.
Tell us what you need to solve. The first conversation is to understand the problem, not to sell you something.
We reply within 1 business day.