DoNexus

We go back with DoNexus further than the work does. We first met Zeno years ago in the Munich student-consulting world we both came up in, old contacts who found each other again. So when he and Daniel started DoNexus, the first engagement was small and technical, a way to test the fit on both sides. It held. We kept working month after month, mostly in the code, and somewhere inside a market-strategy workshop it became obvious this was bigger than a tech contract.

What DoNexus had was the part most startups lack: the property-management world understood cold, and a market read the incumbents had missed for a decade. What it needed was the technical company behind the idea, and a brand that could make a conservative industry take a young one seriously.

The job was to build something a conservative industry would trust and an investor would fund, without the burn rate that ends a pre-seed company before its first raise.

So we started where the risk was highest, with a forensic audit of the entire codebase, CTO & Co-Founder Yannik in the solo lead, a €5,000 kickoff and no long contract to sign. From there it ran: security hardening across the platform, a realtime phone integration, API connections into Hausbank and the other systems a German property manager already lives in, and continuous architecture sparring on the calls where the expensive decisions get made. The point was flexibility, fundamental pieces delivered without bolting fixed costs onto a company counting runway in months.

Out of those calls grew a partnership. We were in the code, but we kept thinking past it, naming what the company would need next before it ever landed in a brief, and DoNexus noticed. So when the angel round closed, they pulled us into the brand, the brand opened up the wider strategy, the strategy opened up the go-to-market, and milbo became the studio behind all three. It started with an audit and working on the product over to a workshop on brand and market which resulted in an end to end framework what it would take to scale DoNexus. Once the plan got clear it is all about levelling it up one piece at a time, each step carrying into the next as the execution journey begins.

The round closed in October 2025, with Superangels, Buildery VC, and Interhyp founder Marcus Wolsdorf among the backers, and more planned. DoNexus is doing what it set out to do: turning property management from reactive desk work into something that moves first, for the managers, owners, and tenants on the other side of every request.

The ambition was never a single feature. It is to be the AI standard for the German property-management industry, the layer that takes a reactive, paper-bound trade and makes it proactive and data-driven. We built the technical foundation and the brand that carries it, we stayed on as the partner on call, and we are still in it as that ambition plays out.

Scaling in a conservative market means proving technical maturity and an enterprise-grade presence at the same time. Most teams manage one. We held both, on one team. If that is the shape of what you're building, the next step is a call.