Carl Meyer
Software Engineer at Astral
Bellingham, Washington, United States
Summary
🤩
RockstarCarl Meyer is a seasoned software engineer with 17 years of experience building robust Python tooling and backend systems, currently developing Python dev tools in Rust at Astral. A long-time open-source contributor and Python Software Foundation fellow, he has directly impacted core projects including CPython, mypy, pip, and the ultra-fast Rust linter ruff. He brings deep Django expertise as a core team member and co-founder of OddBird, with a track record of shipping practical fixes and features across large projects at Meta, Instagram, and Mozilla. His work spans interpreter internals, static typing, package management, and developer tooling—often improving developer ergonomics and cross-platform correctness. Notably, he blends hands-on systems work (fixing Windows build issues and adding new interpreter features) with technical writing and tooling improvements that make complex projects more maintainable. Based in Bellingham, WA, he pairs pragmatic engineering with a long history of mentorship and collaborative open-source leadership.
17 years of coding experience
Stackoverflow
124,181reputation
9.4mreached
285answers
7questions
mysql
top-5%
orm
top-1%
django-models
top-1%
oop
top-5%
virtualenv
top-1%
merge
top-1%
Github Skills (92)
parser10
restructuredtext10
python10
package-management10
testing10
plugin-development10
bash10
c1110
interpreter10
c1710
type-system10
semantic-analysis10
django-forms10
linter10
pip10
Programming languages (17)
Github contributions (5)
Instagram/MonkeyType
Oct 2017 - Jan 2023
A Python library that generates static type annotations by collecting runtime types
Role in this project:
Backend Developer
Backend DeveloperContributions:24 reviews, 206 commits, 141 PRs in 5 years 4 months
Contributions summary:Carl's contributions primarily focus on the development and maintenance of the MonkeyType project, a Python library for generating static type annotations. They added a hard dependency on the 'retype' library, implemented date-based versioning, and created the initial drafts of documentation including README and CONTRIBUTING files. The user also introduced testing frameworks and type checking into the development workflow to improve the project's maintainability.
pythonruntime-typetype-annotations
jazzband/django-model-utils
Jul 2010 - Apr 2017
Django model mixins and utilities.
Role in this project:Back-end Developer
Back-end DeveloperContributions:270 commits, 31 PRs, 63 pushes in 6 years 9 months
Contributions summary:Carl contributed to the Django model utilities library by implementing a `manager_from` function, which allows for the creation of custom managers with mixins and chainable querysets. The user's commits also included test coverage improvements and compatibility fixes for Django 1.1, demonstrating a focus on functionality and version support. Further contributions involved fixing bugs in the `InheritanceManager` and addressing issues related to field tracking.
djangomixins
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