Stefan Richthofer
Founder at APIdia
Bochum, North Rhine-Westphalia, Germany
Summary
🤩
Rockstar🎓
Top SchoolStefan Richthofer is a founder and technical innovator with 12 years of experience bridging research-grade algorithms and production software, currently building APIdia.net, a fast, fully crosslinked API documentation platform. With a PhD in computer science and a background in mathematics, he invented the Predictable Feature Analysis algorithm and has a history of translating academic ideas into robust Python/NumPy implementations and test suites. He is an active open-source contributor and long-time Google Summer of Code mentor, notably advancing Jython internals—garbage collection, bytecode handling, and Java integration—which reflects deep familiarity with JVM/Python interoperability. Stefan has taught computer science and electrical engineering, bringing clarity to complex topics from assembly to data science. Colleagues describe him as a meticulous problem solver who balances the big picture with relentless attention to detail, and who frequently surfaces non-obvious improvements in developer tooling and runtime behavior. Located in Bochum, Germany, he combines academic rigor with entrepreneurial drive to improve how developers discover and use APIs.
12 years of coding experience
Master of Science - MS, Mathematics and Computer Science, Master of Science - MS, Mathematics and Computer Science at Ruhr University Bochum
Github Skills (7)
garbage-collection10
jython10
javas10
python10
bytecode10
java10
testing10
Programming languages (8)
Github contributions (5)
jython/frozen-mirror
Aug 2014 - Nov 2019
A Mirror of hg.python.org (now frozen). Please use jython/jython.
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:141 commits, 23 PRs, 112 comments in 5 years 3 months
Contributions summary:Stefan's contributions primarily focused on the internal structure and testing of the Jython runtime. They fixed finalizer-related issues, implemented CPython-style garbage collection features, and added Python-level documentation and testing for various modules, including the _json, cStringIO and datetime modules. Furthermore, the user updated the bytecode handling and tested it thoroughly with large methods and a dedicated test-suite, indicating a strong understanding of the JVM bytecode generation pipeline. Finally they also added and improved Java integration and API for better developer experience.
jythonpythonpython3frozen
Stewori/jython.github.io
Jun 2020 - Jan 2025
Web site for Jython
Contributions:2 PRs, 11 pushes, 1 branch in 4 years 8 months
pythonweb-sitedjangopython3jython
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