300+ test centres, one platform

Kassenärztliche Vereinigung Baden-Württemberg is the body that organises panel doctors across Baden-Württemberg. When the pandemic arrived it had to stand up testing across a whole federal state, and the timeline was set by the virus rather than by a procurement cycle.

Labfy is the platform that carried it. More than three hundred test centres ran on it.

The moment it was built for

Baden-Württemberg is a state of eleven million people. KVBW's answer to the pandemic was a network: specimen collection centres in every district, drive-in test stations, and more than seven hundred focal-point practices — all of it needing to exist within weeks, not quarters.

The rules left no room for improvisation. A positive result is notifiable under Germany's Infection Protection Act, so every test had to end with the patient informed and the health authorities told. And from March 2021, every resident in the country was entitled to at least one free rapid test a week — a change of law that turned testing from a clinic's task into a population's habit, overnight.

That is the environment Labfy was built into: a legal chain that could not be shortened, on a deadline that could not be moved, at a scale that was about to multiply.

One record, four steps

A test centre is not one job. It is four, and each of them fails differently.

• Registration. Someone arrives, or books ahead — at Labfy centres, usually by scanning the booking QR taped to the door. This is the step that decides whether a queue forms outside in the cold.
• Testing. The sample is taken and tied to the person it came from. A mismatch here is not an inconvenience; it is a wrong result sent to a real person.
• Results. The outcome goes back to the individual, reliably, and in a form they can show someone.
• Reporting. The numbers go to the authorities that need them, in the shape they need them.

They are one record moving through four hands. Splitting them across four systems is what produces the failure everyone remembers from that period, where a person tested on Tuesday hears nothing until Friday and nobody can say why.

The timeline

• The brief. KVBW needs test centres running across the state, in weeks.
• Weeks later. The first centres are live on Labfy — booking, testing, results and reporting, from their first hour.
• March 2021. Free weekly testing for every resident begins nationally. Demand multiplies; the platform absorbs it.
• Through the pandemic. More than three hundred centres carried, end to end, for as long as they were needed.

Built for the week it was needed, not the quarter

Software written under that kind of time pressure usually shows it afterwards. The interesting thing about Labfy is what happened next: it kept running, at scale, through the period when the work stopped being about features and became about uptime — including the months after free weekly testing turned every resident into a potential booking.

That is the measure we hold ourselves to generally. A system is worth what it is still doing in five years, which is why the documentation and the tests are part of the job rather than an extra at the end.

Why this one gets asked about

Most of what we are asked to fix was built by someone who had already moved on. Labfy is the counter-example we point at: the same senior people designed it, shipped it and stayed on it while three hundred sites depended on it.

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