Jeroen Janssens
Jeroen Janssens, PhD, is Head of Developer Relations 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.
Session
Polars is a lightning fast DataFrame library that is taking the data science community by storm. Its elegant and expressive API makes analyses pleasant to write and efficient to run. In this workshop, we’ll demonstrate how Polars enables data scientists to go from raw data to reports–by reading, transforming, and visualizing data.