Casper Van Der Wel
Software Engineer at Nelen & Schuurmans
Utrecht, Utrecht, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolCasper Van Der Wel is a software engineer with 11 years of experience building scalable web and geospatial systems from Utrecht, Netherlands. He combines a strong academic background (PhD in Physics) with practical expertise in Python, Django, FastAPI, NumPy, SQL and cloud-native geospatial tooling, leading teams as Lead Developer and chairing a technical advisory board. At Nelen & Schuurmans he shipped operational services for hydrological modelling, federated authentication, raster/vector processing and time-series APIs, often tying scientific models to reliable production systems. An active open-source contributor, he has improved core geometry libraries (GEOS, Shapely) and strengthened cross-platform build and test infrastructure for projects like PyAV. His work bridges low-level C extensions and high-level API design, and he frequently authors and refactors tests to ensure correctness in complex numerical and spatial code. Beyond engineering, his PhD-driven experimental and statistical skills give him uncommon depth in measurement, modeling and problem decomposition.
11 years of coding experience
2 years of employment as a software developer
BSc, Physics and Chemistry, Cum Laude, BSc, Physics and Chemistry, Cum Laude at Utrecht UniversityMSc, Nanomaterials: Chemistry and Physics, Cum Laude, MSc, Nanomaterials: Chemistry and Physics, Cum Laude at Universiteit UtrechtDoctor of Philosophy - PhD, Physics, Doctor of Philosophy - PhD, Physics at Universiteit Leiden
Dutch, English
Github Skills (24)
c-language10
geometry10
py10
python10
apidoc10
setuptools10
testing10
ffmpeg10
c1110
geojson10
appveyor10
cicd10
c1710
api10
geos10
Programming languages (18)
Github contributions (5)
shapely/shapely
Jun 2019 - Dec 2022
Manipulation and analysis of geometric objects
Role in this project:
Back-end Developer
Back-end DeveloperContributions:106 reviews, 280 commits, 25 PRs in 3 years 6 months
Contributions summary:Casper made significant contributions to the `shapely/shapely` repository, focusing on enhancing its geometric manipulation and analysis capabilities. Their work involved implementing new functions, such as "simplify" and related methods, which involved direct code changes and modifications in the project's C code files. They also made updates to documentation, which involved refactoring of the functions with respect to documentation.
manipulationgeometricpythongeometry
PyAV-Org/PyAV
Sep 2016 - May 2017
Pythonic bindings for FFmpeg's libraries.
Role in this project:Backend & DevOps Engineer
Backend & DevOps EngineerContributions:14 commits, 3 PRs, 18 comments in 8 months
Contributions summary:Casper primarily focused on improving the build and testing infrastructure for the pyav project. Their contributions include fixing compiler issues for different Python and Windows versions, cleaning temporary build folders, and adding missing library dependencies. They also implemented environment variable support for build configuration and fixed tests related to platform compatibility. Additionally, the user made improvements to the build system by including the use of Miniconda in Appveyor and adjusting the configuration to better handle MSVC compilers.
ffmpegpyavpythonpythonic
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