Modernize old software in stages while work continues

Somewhere in your business, a system has been running for fifteen years. It does its job, but nobody knows exactly how anymore. The builder has retired, the documentation is a binder of printouts, and the last time someone changed something, invoicing was down for a day. So nobody touches it anymore. Meanwhile, every year it gets harder to put new people on it, connect anything to it, or keep it secure.

Why old software becomes a risk

Old software rarely breaks all at once. It slowly gets more expensive. The server runs on an operating system that no longer receives security updates. Only a handful of people still want to work with the programming language. An integration with your new accounting package does not work, so someone retypes the figures. And if the one colleague who really understands the system calls in sick, part of your business stands still.

We call that legacy: software that still works, but that you no longer dare to change. The problem is not that it is old. The problem is that you can no longer build on it. Every request from your team, every new legal requirement, and every integration runs into it.

Replace it in stages

The classic approach is a big project: build for two years, migrate in one weekend, and hope everything works on Monday morning. That often goes wrong, because an old system does more than anyone had on paper. We do it differently. We put the new system next to the old one and move it component by component. First the part that hurts the most, for example order entry or reporting. Your team works in the new version there from day one, while the rest simply carries on in the old system.

That way you can stop, continue, or adjust after each step. The old system keeps running as a safety net until the last component has moved. Only then is it unplugged. The first component is often ready as a prototype within ten business days, so you quickly see whether the direction is right.

Understand first, then build

Before we write a line of code, we read the old system. The source code if it still exists, otherwise the database and the behavior on screen. We talk to the people who work with it every day, because they know which button you must never press and which field actually means something other than its label says. From that comes a list of what the system really does, what has become redundant, and what has been missing for years.

The data gets the most attention. Fifteen years of clients, orders, and history often sit in a structure that has grown crooked over time. We extract it, clean it up, and move it into a modern database. On that, we build the new application, with technologies every developer knows. If the new system has to talk to your accounting system or your online store, we take that along right away as System integration.

You own the data and code

The whole point of modernizing is that you never want to depend on one person or one vendor again. So you get the source code, the documentation, and the data model. The data sits in a secure database within the EU, and we work according to the GDPR. After that, you can manage the new system yourself, place it with another party, or leave Software maintenance to us. That is your choice, not ours.

If the intake shows that the old system is fine and simply nobody manages it anymore, we say so too. Then modernizing is not needed, and taking over the maintenance is enough. We tell you that right away.