Jörn Hees
Machine Learning Engineer
Germany
Summary
🤩
RockstarJörn Hees is a Machine Learning Engineer with 15 years of experience based in Germany, combining expertise in semantic web technologies, linked data, and practical ML engineering. He is an active open-source contributor—most notably to RDFLib—where he improved datatype mappings, concurrency fixes, documentation, and in-memory store performance, showing attention to both correctness and efficiency. His contributions to gae-init demonstrate backend strengths in Python and Flask, including permissions, dependency management, and user-model refactoring for production-ready apps. He also improves developer experience through clear technical writing, as seen in documentation work on DEAP. Jörn blends deep knowledge of RDF/linked data with hands-on system improvements, making him effective at turning semantic data challenges into reliable, maintainable software.
15 years of coding experience
Stackoverflow
3,358reputation
752kreached
73answers
15questions
python
top-5%
Github Skills (25)
restructuredtext10
python10
back-end-development10
sphinx10
rdflib10
rs10
google-app-engine10
flask-ask10
rest10
rdf10
flask10
documentation10
testing9
dependency-management9
data-structure7
Programming languages (19)
Github contributions (5)
RDFLib/rdflib
Jun 2012 - Oct 2019
RDFLib is a Python library for working with RDF, a simple yet powerful language for representing information.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4 releases, 359 commits, 175 PRs in 7 years 5 months
Contributions summary:Jörn primarily contributed to improving the rdflib library, demonstrating a focus on enhancing its functionality and maintainability. Their work involved correcting mappings for data types, updating documentation to improve clarity and completeness, and optimizing the performance of the IOMemory store. Additionally, the user addressed bugs related to concurrency and added tests to ensure the reliability of the library.
pythonpypisemantic-webrdf-xmlparser
gae-init/gae-init
Jul 2013 - Oct 2014
Google App Engine based on Python, Flask, RESTful, Bootstrap and tons of other cool features
Role in this project:Back-end Developer
Back-end DeveloperContributions:39 commits, 4 comments in 1 year 3 months
Contributions summary:Jörn primarily focused on enhancing the functionality of the Google App Engine application by implementing features such as user permissions and updating dependencies. They updated the `flask-login` library and refactored the code to use properties instead of computed properties. Additionally, the user added route decorators for user permissions, extended the User model, and adjusted the user interface to incorporate these new features. The user also addressed build and dependency management.
google-apppythonapp-enginerestfulflask
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