A senior engineer you can hand the hard part to.
I’m a freelance software engineer and fractional CTO based in Vienna & St. Gallen. I build and lead the engineering behind security-tech and marketplace products.
I’ve spent the last 8 years building software that other people depend on — and, since co-founding my first startup in 2018, founding the companies that ship it. Today I’m Co-Founder & CTO of OnDuty, Founder & CTO of Nisura, and the lead engineer or technical advisor behind several products across the EU, the UAE, and Turkey.
My work clusters around two worlds: security-tech — where real-time operations, compliance, and trust are non-negotiable — and marketplaces, where the hard part is matching supply to demand fast and reliably. Before going independent I led backend engineering at nu. education in Zurich, and earlier co-founded Advertilio, a computer-vision startup we later exited.
I studied Technical Mathematics at TU Wien and Computer Science at the University of St.Gallen — foundations I lean on daily. But what I actually enjoy is the unglamorous part: clear service boundaries, honest observability, working-time and compliance logic that holds up, and code the next engineer can read without me in the room. I like being the person a team can hand the hard part to — and trust to hand it back working.
I also recruit senior tech talent globally — engineers and architects, including current searches for OT/ICS and IT-infrastructure architects on critical-infrastructure programmes. If you’re hiring for something hard to fill, or looking for your next role, that network is open to you.
Tools I reach for
- 2018
- founding companies since
- 3
- startups co-founded · 1 exit
- 6
- products led across EU, UAE & TR
- CET
- Vienna & St. Gallen · remote-first
Four habits I don’t compromise on.
Own the outcome, not the ticket
I take responsibility for the system working in production — not just for the code I was handed. That founder’s reflex is what I bring to every engagement.
Boring where it counts
I spend novelty budget on the core problem and reach for proven, well-understood technology everywhere else. Reliability compounds; cleverness rarely does.
Instrument, then decide
No performance work, no architecture call, and no rewrite without data first. I measure, then move — and I keep the trade-offs visible the whole way.
Leave it maintainable
Good consulting makes itself replaceable. I write the runbooks, pair with your team, and hand back systems people can run without me.
Where I’ve been building.
The European CRQ engine — translating an attack surface into financial exposure and NIS2 liability.
The digital backbone for modern field teams — I architect and lead the development.
Architecting and advising marketplaces and platforms across the UAE, Turkey, and Switzerland.
Technology strategy and architecture for an established Austrian security operator, including incident response.
Grew from engineer to lead over 3.5 years, building next-gen vocational learning on Spring Boot and Kubernetes.
Consulting and delivery on Spring Boot / Spring MVC systems.
Deep-tech startup using computer vision and ML to read visual appearance and body language in real time for DOOH. Acquired.
Left to focus on my own ventures.
Software quality assurance, JUnit, and the mathematical foundations behind the systems I build.
Thesis: “Investigation of Software Architectures for Smart Manufacturing Systems” (Prof. Dr. Ronny Seiger).
Have a system that needs to hold up? Let’s talk about it.
Tell me what you’re building and where it hurts. I’ll reply within a day with an honest read on whether — and how — I can help.