Maarten Breddels
Founding Engineer at Widgetti BV
Greater Groningen Area Netherlands
Summary
🤩
Rockstar🎓
Top SchoolMaarten Breddels is a founding engineer and entrepreneur with 12+ years building high-performance Python web and data apps, currently leading Widgetti (creator of Solara) and co-founding Grotto AI and PyCafe. He specializes in pure-Python, React-style web frameworks for data science, scaling Jupyter-first applications from dashboards to multi-user web services. A prolific open-source contributor, his work spans low-level performance (Apache Arrow, vaex), interactive visualization (bqplot, ipyvolume, voila) and robust Jupyter integration (nbconvert, jupyter_server, ipywidgets). His background in astronomy (MSc, PhD) informs a pragmatic approach to large-data problems and numerical computation, while contributions to projects like underscore.js show deep cross-language fluency in handling edge-case data comparisons.
12 years of coding experience
11 years of employment as a software developer
Bachelor's degree / Engineer Information Technology, Bachelor's degree / Engineer Information Technology at HanzeMaster of Science (MSc) Astronomy, Master of Science (MSc) Astronomy at University of Groningen
English
Stackoverflow
1,384reputation
287kreached
30answers
0questions
python
top-5%
Github Skills (82)
notebook10
fastapi10
arraybuffer10
python10
utf10
authentication10
ipython10
websocket10
websockets-client10
text-processing10
visualizations10
client-websocket10
javascript10
async10
tornado10
Programming languages (16)
Github contributions (5)
vaexio/vaex
Jan 2014 - Dec 2022
Out-of-Core hybrid Apache Arrow/NumPy DataFrame for Python, ML, visualization and exploration of big tabular data at a billion rows per second 🚀
Role in this project:
Back-end Developer & Release Manager
Back-end Developer & Release ManagerContributions:4 releases, 174 reviews, 3796 commits in 8 years 11 months
Contributions summary:Maarten's primary contributions revolve around releasing and maintaining various components within the Vaex project. Their commits predominantly focus on version updates for different packages like vaex-core, vaex-hdf5, and vaex-ml. The user is responsible for ensuring the project's dependencies are up-to-date, and for managing the automated release pipeline. These changes indicate a focus on continuous integration and continuous delivery.
apache-arrowdataframemachine-learningnumpypython
widgetti/solara
Mar 2022 - Feb 2023
A Pure Python, React-style Framework for Scaling Your Jupyter and Web Apps
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:223 reviews, 667 commits, 490 PRs in 11 months
Contributions summary:Maarten primarily contributed to the backend functionality by refactoring the application to support multi-user and multi-server startups. They modified server-side code, particularly files related to the core server logic (`server.py`), the API endpoints (`fastapi.py`), and testing infrastructure (`server_test.py`). The changes included implementing WebSocket communication and integrating data app features, likely improving the system's scalability and user experience.
jupyterpythonreactdataappfastapi
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