Tajo
Legally valid clock-ins and voice-dictated site reports, built with Grupo Edma for its sites and crews. Works without coverage and syncs on its own.
Product and engineering studio in Madrid. We have two apps of our own in the stores, one clocks in on building sites every day, and we fix the budget before writing any code. We know the way. Now we walk it with you.


We rescue vibe-coded projects. Bring it as it is: messy, undocumented and without shame. Nobody judges out loud here. We audit it, tell you what's worth keeping and finish it with real engineering.
No account managers, no PDFs someone has to interpret later. The interface is decided right next to the code.
Flutter and native for iOS and Android. We already paid the app-store toll with our own apps, so yours ships down a road we know.
Real-time chat and voice with the model your case needs. We work out the cost per conversation and the latency before writing code.
Serverless, authentication, payments and subscriptions verified server-side. Scales when things go well and costs little while they don't yet.
A design system of our own: type, colour, components and the level of detail nobody notices until it's missing.
Two apps in use and one about to ship. None of them is a portfolio mock-up.

Tajo was born with Grupo Edma, for its sites and crews: legally valid clock-ins, voice-dictated reports and a dashboard that only flags what needs looking at. A real construction group uses it every day. Building its future, in a plisplas.
On emulators and real hardware: network, battery, rotation and interruptions. Critical flows, like payments and subscriptions, are also verified server-side.
A person reads it and replies within 24 working hours.