Your legacy system is blocking you?
We modernize without risk.

Legacy systems are the backbone of business processes in many companies. They were built over years or decades, contain valuable domain knowledge, and work – at least in day-to-day operations. But at some point, the ratio tips: maintenance costs rise, modifications take disproportionately long, and the risk with every change grows. When only two or three people in the company understand how the system really works, the dependency becomes a strategic risk.

The obvious reaction – rebuild everything from scratch – fails in practice with alarming frequency. Studies show that over 60 percent of all big-bang migrations significantly exceed budget or timeline, and many are abandoned entirely. The reason is simple: in a mature system, there are hundreds of implicit business rules that are documented nowhere. Anyone who replaces everything at once must first understand all these rules before a single line of new code can be written. This takes months and ties up enormous resources while day-to-day business must continue.

Our approach is fundamentally different. We use the Strangler Fig Pattern, named after tropical strangler figs that slowly grow around an existing tree and eventually replace it. Applied to software, this means: we identify the components of the legacy system that cause the most pain and replace them first – while the rest of the system continues unchanged. An API facade ensures that new and old components work together seamlessly.

This step-by-step approach has several tangible advantages. First, we deliver fast, visible results. Within a few weeks, the first improvements are noticeable: faster releases, fewer errors, better data quality. Second, risk remains controllable. Each migration step is small enough to roll back if problems arise, without endangering the entire operation. Third, everyone involved – your team and ours – learns more about the system with each step and can plan subsequent steps better.

In practice, we begin with a legacy audit where we analyze your existing architecture, quantify technical debt, and create a prioritized modernization roadmap. We consider not only technical factors but also business priorities: which areas have the greatest impact on revenue, customer satisfaction, or operational efficiency? Which dependencies need to be resolved first? Where are quick wins possible that provide immediate relief?

Our modernization projects typically include replacing monolithic architectures with modular services, migrating outdated database systems, introducing automated testing and deployment pipelines, and documenting business logic that previously existed only in the heads of individual employees. Each of these steps reduces dependency on the legacy system while simultaneously increasing your team's capability.

Knowledge transfer is particularly important to us. A modernization is only sustainably successful when your team understands, can maintain, and further develop the new system. That's why we work closely with your developers, conduct pair programming sessions, and document architecture decisions traceably. At the end of the project, there's not just a better system, but also a team that can confidently work with it.