Jelle Zijlstra
Python Typing Council member and language contributor who works on developer productivity at OpenAI and has been involved with Python typing governance since the council's formation.
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Mar 6, 2026 • 1h 2min
#539: Catching up with the Python Typing Council
Carl Meyer, a Rust-based type checker developer with experience adding typing at Instagram. Rebecca Chen, a Python typing engineer who worked on Google’s Python team. Jelle Zijlstra, a typing council member focused on language governance at OpenAI. They explore how the typing council governs spec decisions, clashes between type checkers, new Rust-based checkers, nullability debates, and practical guidance on how much typing to add.
