Yunwon Jeong
Software Engineer at LINE Investment Technologies
South Korea
Summary
🤩
Rockstar🎓
Top SchoolYunwon Jeong is a seasoned software engineer with 17 years of experience building reliable back-end systems and contributing to high-profile open source projects. Based in South Korea, he has shipped production software at companies like NAVER and Line Financial and now works at LINE Investment Technologies. Yunwon is an active OSS maintainer (github.com/youknowone) with notable contributions to projects such as Sanic, RustPython, CPython, and the Rust libc—demonstrating expertise across Python, Rust, and systems-level APIs. His work often focuses on core functionality, testability, and performance improvements, from interpreter internals and web framework routing to cross-platform coreutils optimizations. Colleagues value his attention to code quality and pragmatic refactors that reduce technical debt while enabling new features.
17 years of coding experience
10 years of employment as a software developer
Bachelor of Engineering (B.Eng.) Computer engineering, Bachelor of Engineering (B.Eng.) Computer engineering at 연세 대학교, 서울 (Yonsei University, Seoul)
English, Korean
Github Skills (66)
python10
exchange-server10
testing10
plugin-development10
winapi10
c1110
interpreter10
integrations10
c1710
cryptocurrency10
linter10
command-line-tool10
drupal-module10
sanic10
crypto10
Programming languages (18)
Github contributions (5)
RustPython/RustPython
Apr 2019 - Jan 2023
A Python Interpreter written in Rust
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2787 reviews, 2693 commits, 2742 PRs in 3 years 9 months
Contributions summary:Yunwon's contributions primarily focused on enhancing the core functionality of the RustPython interpreter. They implemented new features, such as exposing `PyTuple::_new`, `PyFrozenSet`, and `time::time` for public access, enabling better integration and control over the interpreter's behavior. Their work also involved refactoring module structures and addressing bugs related to bytecode generation and processing, demonstrating expertise in improving the internal workings of a Python interpreter.
pythonjitrustpython-interpretercompiler
sanic-org/sanic
Dec 2016 - Dec 2017
Accelerate your web app development | Build fast. Run fast.
Role in this project:Back-end Developer
Back-end DeveloperContributions:16 commits, 20 PRs, 52 comments in 11 months
Contributions summary:Yunwon primarily contributed to the Sanic web framework, focusing on improving its core functionalities and testability. Their work included enhancing the handling of hooks parameters for better debugging and implementing routing overload features. The user also addressed issues in the testing framework by fixing redirection issues and preventing meaningless tracebacks. Furthermore, they introduced improvements to error logging and added a feature to support Gunicorn worker termination.
next-generationasgipythonweb-serverasyncio
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