Hello everybody,
I work at Quansight Labs and spend time on:
- Polars
 - Narwhals (🎵 swimming in the ocean, causing a commotion🎶)
 - assorted consulting / training
 
I've also written some assorted little tools:
- cython-lint (the world's first Cython linter?)
 - absolufy-imports (superseded by ruff)
 - nbQA (mostly superseded by ruff, but still gets ~300k downloads/month for some reason)
 - auto-walrus (hopefully won't be superseded by ruff)
 - polars-xdt (eXtra stuff for Dates 'n' Times)
 - polars-reverse-geocode (quite niche, but some people use it)
 
and a tutorial on how to write Polars Plugins: https://marcogorelli.github.io/polars-plugins-tutorial/. Don't be scared
Socials: