Data scientist & engineer Open to interesting projects Enschede, the Netherlands

Turning turbulent data into things that work.

About

From physics PhD to making data useful

I'm a data scientist and engineer at TenneT, the Dutch–German grid operator, with a PhD in experimental physics from the University of Twente — turbulence, bubbles, and a lot of laser light. That is where the habit of measuring things properly comes from.

Fifteen-plus years of Python later, I build end-to-end machine-learning systems: the model, the pipeline around it, and the boring parts that make it survive contact with production. Lately that means LLMs, and Rust when Python is too slow.

I write about it on the blog, long articles and short TIL notes alike, and I spend as much time as I can underwater.

  • Python
  • Machine learning
  • LLMs & GenAI
  • Data engineering
  • MLOps
  • Rust
  • Docker
  • Svelte
  • Open source

Things I like

The bit that isn't on LinkedIn

Cold Dutch water, French caves, a scooter when the line is long enough. Every dive is logged — the boring ones too.

Dives
674
Hours down
632.8
Deepest
44.4 m
Countries
11
Cave dives
182
Scooter dives
30
2005 dives per year 2026

Last dive: 8 Aug 2026 · Slijk-Ewijk

Open source Small tools that scratch a real itch.Home automation Home Assistant, a heat pump that reports to Grafana, too many sensors.

Work

Selected things I've built

2021 – now

Grid analytics at TenneT

ML systems and data pipelines for the Dutch–German high-voltage grid: forecasting, anomaly detection and the plumbing that keeps them honest.

MLData engineering

2020

pigeonXT

A Jupyter widget for fast, keyboard-driven labelling of text and images. Used by data teams that would rather label than build labelling tools.

Open sourcePython

2020

Python 10 Minutes a Day

A 40-part series on Towards Data Science taking readers from zero to comfortable Python, ten minutes at a time.

WritingTeaching

2011 – 2016

PhD — turbulence

Experimental fluid dynamics at the University of Twente: bubbles, boundary layers and a lot of laser light. Where the data habit started.

PhysicsResearch

Surface interval

Get in touch

Interesting problem, a talk, a dive trip? open to interesting projects — the fastest way is e-mail.

Last dive: 8 Aug 2026 · Slijk-Ewijk