A couple of young office workers discussing.
K3b
Digital Development. Personal Collaboration.
As a technology partner for medium-sized businesses, agencies, corporations, and public institutions, we support our clients throughout the entire lifecycle of digital products – from idea to operation. We work full-stack, multi-disciplinary, and solution-oriented.

We believe in strong engineering craftsmanship. That’s why we approach projects in a structured way – with clear architecture, iterative development, and thorough quality assurance. Our solutions integrate seamlessly into existing systems and are maintainable, future-proof, and accessible. We combine engineering excellence with digital innovation. What sets us apart is not only our expertise, but also how we work. We are not a loose developer collective or an anonymous systems house. We are a team that knows and trusts one another – and takes responsibility.
Then. Now. Next.
Full-Stack, Data & AI
NEXT
Building what’s next
Founding of k3b GmbH
The Founders
Portrait of Marc Holtbecker
Marc Holtbecker
Managing Director
Portrait of Jens Schumann
Jens Schumann
Co-Founder
Portrait of Marco Di Sarno
Marco Di Sarno
Chief Data Scientist | Co-Founder
The Team
”Proud when we surpass clients expectations.”
Jonas, Software Engineer
”Best moments: solving problems together!”
Felix, Software Engineer
”Customer vision over mindless feature shipping.”
Samuel, Working Student – Software Engineering
”Come for the skillset, stay for the team!”
Marc, Managing Director
Network
The Kube Group
We are an independent partner within the Kube Group – a network of companies combining engineering, data, and digital expertise.
Kube GmbH
Ingenieurbüro
Esslinger Straße 83
D-73207 Plochingen
Kube Ingeniería S.L.
C/ Marqués de Montortal 2
46091 València
Spain
K3 Systementwicklung GmbH
Esslinger Straße 83
D-73207 Plochingen
K3B GmbH
Mittelweg 50
D-12053 Berlin
Contact
Share your ideas and challenges with us – we look forward to meeting you.
info@k3b.de