
City-scale digital twin of 's-Hertogenbosch
A streaming lakehouse that fuses building registry, traffic, weather and air sensors into one live 3D model of the city.
Read the case →
I build the data, AI and software behind tools people use every day.
● Traffic layer
Camera feeds are turned into moving points on the city twin. Each vehicle is detected, its speed is tracked, and the model forecasts where traffic will slow down next.
In view
0
Avg speed
0 km/h
Passed
0
CO₂
412 ppm
NO₂
24 µg/m³
PM2.5
9 µg/m³
Forecast, next 8 hours
● Where this is going
Digital twins turn data into a model you can watch, question and test before acting. I think they will shape how cities, farms and factories are run, in Africa and across the world.
Traffic, air, energy and buildings in one live view, so councils plan with facts instead of guesses.
Soil, weather and crop data brought together, so farmers know when to water, feed and harvest.
Machines and production lines mirrored in software, so problems show up before they cost money.
Water, climate and infrastructure watched from sensors and satellites, from Africa to Europe and beyond.
Designing how your data should flow, where it lives and who owns it, so the platform can grow without a rebuild.
A warehouse or lakehouse on Google Cloud and BigQuery that everyone can query and trust.
Getting data out of APIs, sensors and systems, in batches or live, and keeping it flowing reliably.
Clear models and one set of definitions, so every dashboard and report tells the same story.
Tests, lineage and clear ownership, so problems get caught before they reach a decision.
Forecasts, assistants that answer from your own documents, and live models of places or processes.
The apps, APIs and dashboards on top, built with ten years of engineering behind them.
1–2 weeks
We look at what data you have, what you need, and whether it's doable.
4–8 weeks
You see working software every week, and we adjust as we go.
1–2 weeks + optional support
It goes live with documentation. I can stay on for support if you want.
● Tech stack
Kai
Ask about my experience, stack or how I work. Kai answers right away.
Kai — ask about my experience
Answers come only from my approved profile. Client details stay confidential.
Hourly, depending on the size of the project. You get a fixed estimate after our first call.
€45–60/ hour
A dashboard, a data clean-up, a quick prototype or an advice session.
€60–90/ hour
A pipeline plus dashboard, a forecasting model, or an AI assistant on your documents.
€90+/ hour
Digital twins, real-time systems and projects with several data sources.
Rates exclude VAT.