About Jeroen
Bio
Jeroen Janssens, PhD, is a Senior Developer Relations Engineer at Posit, PBC.
His expertise lies in visualizing data, implementing machine learning models, and building solutions using Python, R, JavaScript, and Bash.
He’s passionate about open source and sharing knowledge.
He’s the author of Python Polars: The Definitive Guide (O’Reilly, 2025) and Data Science at the Command Line (O’Reilly, 2021).
Jeroen holds a PhD in machine learning from Tilburg University and an MSc in artificial intelligence from Maastricht University.
He lives with his wife and two kids in Rotterdam, the Netherlands.
Contact
The best way to get a hold of me is via email: [email protected].
You can also find me on:
- Bluesky: https://bsky.app/profile/jeroenjanssens.com
- Mastodon: https://fosstodon.org/@jeroenjanssens
- LinkedIn: https://www.linkedin.com/in/jeroenjanssens
- GitHub: https://github.com/jeroenjanssens
© 2013–2025 Jeroen Janssens