The system works.
But nobody dares to touch it.

Sound familiar?

• The system was written 10–20 years ago and works, but every change is a risk.
• The people who wrote it are long gone — and there is no documentation.
• Its technology is out of support: no security updates, and no developers who want to work with it.
• Every new feature takes weeks, because nobody knows what it will break.
• A vendor quoted you six figures and two years for a rewrite "from scratch".

Why full rewrites usually fail

"We'll rewrite everything at once" projects fail for three reasons: the business cannot wait two years; nobody remembers all the rules baked into the old code; and at the end, everyone is asked to switch to the new system on a single day.

We work differently.

How we do it

1. Understand first — then cut. Before writing a line of code, we map the existing system, including the hidden parts: dead code, forgotten triggers, procedures not called in years. For one client this revealed that 65% of the system was unused. They paid for one third instead of porting dead weight.

2. The new grows next to the old. No overnight switch. The new system takes over functionality page by page while the old one keeps serving everything else. Users never notice the moment they crossed over.

3. Every step is verified. Each migrated part ships with automated tests that compare the new code's behavior against the old one on identical data. We don't rely on "looks fine".

4. Decisions stay on paper. You get the map of your own system — what is where, and why it is that way. The next change won't start with archaeology.

What you get

• A modern foundation (.NET 10, current databases) where new features take hours instead of weeks.
• A codebase you can actually hire developers for.
• Automated tests that protect your business logic on every future change.
• A documented analysis that remains your property.
• No interruption to your operations during the transition.

Why it's faster with us

We use AI models for the volume of work — they read the old code, write tests and port logic far faster than manual work. But every decision passes through 30 years of engineering experience: what to port, what to let die, what needs checking twice.

The result: modernization of an 823,000-line system — 19 admin sections with 175 automated tests in about 8 working days.