Goodbye Xomnia

Blog article by Jeroen Janssens
Jan 31, 2025 • 2 min read

Today is my last day at Xomnia. As I take a moment to reflect on the past two incredible years, a few personal highlights stand out:

Falling in love with Polars and writing a book about it with my colleague Thijs Nieuwdorp:

Python Polars: The Definitive Guide
Helping our client Alliander completely overhaul their pipeline with Polars:

Advocating for more Polars at Alliander
Attending PyData London with a bunch of fellow data nerds:

Xomnia was well represented at PyData London 2024
Speaking at PyData Amsterdam 2024 and PyData NYC 2024:

At PyData Amsterdam talking about how I hacked UMAP and won at a plotting contest

Sharing what we learned by converting a large codebase to Polars at PyData NYC
The unforgettable company trip to Jordan:

Xomnia's 10 year anniversary trip to Jordan
Data & Drinks, karaoke nights, and countless walks along the Amsterdam canals

Xomnia has been an amazing place to grow, with smart, creative, and, most importantly, fun and kind-hearted people. I’ve learned a lot here, and those experiences will be valuable as I move on to the next chapter. I’ll share more about this soon.

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