Kovlana Dev Studio · Germany
Backends, internal tools, e-invoicing and automations, for anyone with something to build.
What we build
Websites and apps
Websites, web platforms and Android apps, with the backend and database behind them.
Internal tools
Dashboards and admin panels, and the integrations that connect your firm's systems.
E-invoicing
XRechnung and ZUGFeRD invoices, set up for Germany's invoicing rules.
Automations and AI
Booking, forms, email and back-office workflows, plus AI tools built into them: document processing, assistants over your own data, smart forms.
After launch we keep it running: hosting, updates, fixes. We also work on existing systems.
Fixed price per phase, quoted after a short call. No hourly surprises.
Work
These are Nikolas's own products, not client projects. All four are live. They show the kind of software we can build for you.
End-to-end encrypted messenger with post-quantum key exchange. Messages, calls and push-to-talk use keys that combine X25519 with ML-KEM-768. No phone number needed. Native Android client with a Go server.
Free medical education platform with a library, quizzes, clinical cases, diagnostic workups and drug references. In the workups, students choose investigations against a budget and are judged on the path they took. Co-founded with Matilde Bertagnini.
Finance analysis platform with learning materials. Portfolio tracking, risk overview, asset comparison and a correlation matrix, each explained in plain language. Co-founded with Matias Patso.
oikorion.comPython course from the first print() to async and testing. Real CPython runs in the browser through WebAssembly, and every exercise is checked by its own tests.
leveljar.comHow it works
You describe what you want to build. We ask questions.
A written scope and a fixed price per phase, before any work starts.
You see working software early and often, not only at the end.
Code, documentation and access in your own accounts.
FAQ
We reply, set up a short call if it looks like a fit, and send a written scope with a fixed price per phase before any work starts.
It depends on the scope. The written scope includes a time estimate for each phase.
You do, in the sense that matters: once a phase is paid in full, you get the code and the right to use it for your project. Open-source parts keep their own licenses, and our general tools and know-how stay with us.
You choose: we keep it running (hosting, updates, fixes) for a monthly fee agreed upfront, or we hand it over completely.
English, German and Albanian.
Usually, yes. We look at your setup in the first call and tell you what connects easily and what does not.
Yes, remotely.
About
We are a small studio working remotely from Germany, building software from the server to the interface. The four products above are Nikolas Patso's own.
Contact
Send us a short message. We reply within 1 working day and tell you honestly whether we can help.
Available for new projects, remote. Based in Germany.