Hello!

I'm Shantanu. I can often be found under the username hauntsaninja — in particular, find me at:

• Github
• Bluesky / Twitter
• LinkedIn
• username at gmail dot com
• RSS feed

I contribute to open source software, particularly in the Python and static type checking ecosystems. I'm a maintainer of mypy and typeshed, a CPython core developer, and contributor to several other projects. Check out this fun Python CLI tool I made.

I've worked on language models at OpenAI since 2020, studying what data to feed them and building infrastructure to train them. Prior to that, I worked at Quora.

Here's a list of posts on this blog:

• Breakpoints in generated Python code
• Crashes from recursion in CPython
• A cursed file on macOS
• Solving kilordle