Available for new mandates · Potsdam / Berlin · Remote
I scaled a property management platform from 100 to 650 customers, connected a telemedicine platform to the public social insurance system, and lost a company of my own. You get all three experiences in one package. And when a product has to hit the market on schedule, I make sure it goes live.
facilioo · drd.at · Liegenwerk Digital · Zorc · HTR · freiheit.software
> builds things. leads teams.▋
Case studies
Every number is publicly documented or linked on its case page.
Fractional CTO
Scaled a property management platform from 100 to 650 B2B customers: 15 million API requests per day, 250,000 active users, migration from legacy PHP to .NET and Angular.
View case →
Interim CTO
Austria’s first telemedicine platform for general practitioners: e-card connection to the social insurance system, e-prescriptions, qualified electronic signatures. Partnerships with Generali and Drei.
View case →
Founder
My own AI product in production: 250,000 indexed documents, 25,000 incoming invoices, EUR 25 million in invoice volume per year. AI for property managers, no slides.
View case →
References
“Marc led our platform through its most critical growth phase, from 100 to 650 customers, without operations ever standing still. He thinks like a CTO and delivers like an engineer.”
Tobias Bambullis Managing Director, facilioo
Fractional CTO, scaling
facilioo.de ↗“Telemedicine with an e-card connection is demanding, technically and in terms of regulation. As interim CTO, Marc owned the architecture and reliably guided the platform through these requirements.”
Dr. Clemens Billek Board member Kontron, founder drd.at
Interim CTO, telemedicine
drd.at ↗“Marc built the ERP system we use to process our key account orders. He understood our business quickly and delivered a system we work with every day.”
Jens-C. Hagemann Founder, HTR Holz & Transport
ERP for key account orders
htr-berlin.de ↗How I work
Four things you get with me, concretely. All of it proven in real mandates, not in workshops.
When a product has to go live on schedule, I am the insurance. As a forward deployed engineer I take products into production myself, from concept to go-live. My base framework, which bundles best practices for data-driven platforms across design, frontend and backend, makes software happen faster.
My core job as CTO: the platform runs in production, without outages. I design the operating concepts and implement them with the team, from architecture down to Docker and Kubernetes. Four years of stable operations for the digital owners’ meeting are the proof.
I have hired, developed and assembled teams and carried people responsibility. When your project needs more hands, I draw on a reliable network of experienced engineers, designers, DevOps engineers and product managers.
Business intelligence, customer analytics, growth analysis, product performance: I prepare company numbers so that shareholders, investors and partners can make decisions with them. For integrations I keep the line to partners and customers open, all the way into sales.
.NET Angular Django Node.js Rails React PHP Docker Kubernetes
In every one of my roles I was the place where problems were allowed to get stuck. Wherever something jammed, I built the solution.
Services
With prices, so you do not have to guess. Every package starts with a free intro call.
EUR 3,500 to 4,500
fixed price, 2 days
Where does AI actually pay off in your company? Two days of audit instead of months of consulting.
Eligible for German BAFA funding: SMEs can get 50 to 80 percent subsidized.
Core offer
from EUR 6,000/month
1 day/week · 2 days/week: EUR 11,000 to 13,000
CTO responsibility without a CTO salary. I take over technical leadership, your team delivers.
EUR 9,000 to 15,000
fixed price + operations EUR 500 to 900/month
One concrete process as a productive AI agent, including integration into your systems.
on request
interim: EUR 1,400 to 1,800/day · DD: fixed price
Full-time interim during a vacancy or crisis. Tech due diligence for investors and buyers.
Learned at my own expense
With my agency freiheit.software I spent years building and owning software for other companies: scaled facilioo as fractional CTO, led drd.at through a regulated domain as interim CTO, built a complete ERP for HTR. In 2026 I still had to put the agency into liquidation.
The reasons were not in the projects. They were with me as a business owner: lacking cash discipline, too many parallel construction sites, saying no to the wrong prices too late. These lessons are not consulting slides, they are paid-for experience.
The fresh start has long been in production: with FSA Liegenwerk Digital GmbH I run my own AI product for property managers, and as a fractional CTO I support companies that want to avoid exactly these mistakes. You get both: a CTO who has scaled, and an entrepreneur who has carried the risks himself.
About me
I studied at the Hasso Plattner Institute and have been building software for more than ten years: an ERP for order processing at HTR Holz & Transport, foundry software at Zorc, telemedicine with an e-card connection as interim CTO at drd.at, seven years of PropTech as fractional CTO at facilioo. Today I run Liegenwerk Digital, my own AI product in production.
I write code myself, for the past year heavily AI-assisted. .NET is home, and I have shipped production work with Angular, Django, Node.js, Rails, React and PHP as well. My profile: github.com/marcfreiheit.
Contact
The fastest way to an assessment: a short call about your situation. No pitch, no slides.