After nearly five wonderful years at the Python Software Foundation as the inaugural CPython Developer in Residence, it's time for me to move on. I feel honored and honestly so lucky to have had the opportunity to kick off the program that now includes several wonderful full-time engineers. I'm glad to see the program left in good hands. The vacancy created by my departure will be filled after PyCon US as the PSF is currently focused on delivering a strong event. I'm happy to share that Meta will continue to sponsor the CPython Developer in Residence role at least through mid-2027. The program is safe.
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| Łukasz with PSF's Security Developer in Residence Seth Larson and PyPI Safety & Security Engineer Mike Fielder at PyCon US 2025 |
As a member of the Python Steering Council during Łukasz’s tenure as Developer in Residence, I express my personal gratitude for his dedication to the CPython project and the larger Python community. I know I echo the sentiment of everyone who has served on the Council during his time as DiR. He has defined what it means to be a Developer in Residence - a position that is incredibly important to the smooth operation of the CPython project, in large and small ways, visible and hidden. Our bi-weekly meetings gave the Steering Council a detailed, unique, and invaluable contemporaneous perspective on what’s happening in CPython. Łukasz leaves big shoes to fill, and we wish him all the best in his next endeavor. It’s comforting to know that he will continue to be a Python leader and member of the core team.
-- Barry Warsaw; Python Steering Council member 2026
In my time as a developer in residence, I personally touched some pretty amazing projects like the transition to GitHub issues from bugs.python.org, the replacement of the mostly manual CLA process with an automated system, the introduction of free threading to Python, and the replacement of the interactive shell in the interpreter. And between the thousands of pull requests I've reviewed or authored, and the many less glamorous tasks like content moderation and keeping the lights on when it comes to core workflow, I've interacted with some amazing individuals. Some of them are core developers now. I've witnessed the full-time paid developer in residence roster at the Python Software Foundation grow from one person to five.
As for me, ever since seeing it for the first time in 2013, I had dreamed about moving permanently to Vancouver BC. This dream is coming true soon. As part of that move, I'm joining Meta as a software engineer on the Python Language Foundation team. In any case, I'm not disappearing from the open-source Python community. I'll be seeing you online and maybe even in person at Python-related conferences.
