The Karmen story

All innovations come from laziness

It started with a gift

We bought a 3D printer for our office in 2018 as a Christmas gift to thank our employees. We originally thought it would be used to print out parts for drones and other toys, like for special tracks for Legos. It was a lot of fun! But in addition to having fun, we also found out that our printer—like the vast majority of FFF printers—didn’t have a network connection, which meant we had to constantly walk over to it with an SD card. And this is where our aversion to doing unnecessary work comes in—as well as the programmers’ faith that there’s always a simpler way to do things.

The idea came quickly

Right at the start of January 2019, we discovered OctoPrint. We set everything up in such a way as to optimize the number of steps through the office it would take to get to the printer. Unfortunately, not everything in OctoPrint is worked out ideally, so we agreed ourselves to help them improve it. We had some ideas about functions that would be useful, and at the same time we found out that a lot of companies and organisations would welcome the possibility to manage their printers in one place. OctoPrint couldn’t do that—it’s always tied to a single printer. We got the idea for an interesting product, and it just happened to be at a time when we wanted to invest in development. We weren’t held up with analyses of markets and competitors, cost-benefit calculations or product briefs. We just went into it with what we ourselves would find useful and which would be simply scalable to multiple printers. We called the product Karmen because it’s a name that’s easily pronounced. It’s also the name of a variety of strawberry. The strawberry—fragaria in expert terminology—had previously given our company its name.

The result

The first Karmen prototypes fulfilled their purpose, but the product had to be properly developed and tested for real operation. We were greatly helped in this by 3D aréna and Prague’s Institute for Clinical and Experimental Medicine (IKEM), where they print real copies of transplanted organs. We also found out that Karmen has huge added value for schools and co-working spaces. It’s very popular in companies because it enables simple connections between departments where print materials are prepared and branches where the printer is physically present. These don’t have to be in the same building, or even on the same continent.


Martin Burián

Fragaria CEO

Martin Burián loves to talk about project management and new ideas to make his employees’ work environment a better place. Because he was originally an auditor, he makes sure everything in the company works properly. In Fragaria, he’s in charge of HR, finance, economics and corporate infrastructure. He’s had his ups and downs in his 15 years as CEO, but he’s always been able to learn from his experiences. For Burián, as for the whole company, the Karmen project has become a labour of love, and it fills him with great expectations.

Martin Bílek

Fragaria CTO, chairman of

Martin Bílek started programming in his childhood. At the time, his primary machine was a Didaktik Gama, which used audiocassettes instead of hard disks as storage. This is one of the reasons he’s keenly aware of how important it is to keep up with developments and to constantly seek out new and innovative solutions. He considers open source software to be the best direction; it enables programs and solutions to be continuously developed and perfected—Karmen has been built on open source as well. Martin is also the chairman of, the Czech community around the Python programming language.



Developer team

Fragaria is a traditional Czech specialist in the area of custom IT solutions development with many years of experience in the areas of banking, e-commerce, media companies and startups. In its development projects, Fragaria emphasises agile development methodologies, prototyping and modern solutions, which bring clients maximum benefits and added value. In addition to custom development tailored to clients’ needs, Fragaria invests into the development of its own products. More information is available at

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