Jean Felder
GIS Engineer at Oslandia
Greater Paris Metropolitan Region France
Summary
🤩
Rockstar🎓
Top SchoolJean Felder is a GIS engineer with 11 years of experience applying mathematical morphology and research-driven approaches to real-world geospatial problems, currently contributing at Oslandia in the Greater Paris area. He holds doctoral-level training from Mines Paris - PSL and spent over a decade as a research engineer at ESTIMAGES, bridging academic rigor with production GIS workflows. Jean is an active contributor to the flagship QGIS open-source project, where his back-end work improved 3D map viewing, camera controls, and raycasting robustness—fixes that materially enhance visualization fidelity. He combines deep algorithmic understanding with pragmatic code refactoring to remove legacy complexity and fix subtle numerical issues like NaN camera parameters. Colleagues rely on him to translate complex geometric and computational concepts into stable, maintainable GIS software.
11 years of coding experience
14 years of employment as a software developer
phd, morphologie mathématique, phd, morphologie mathématique at Mines Paris - PSLCentrale Lille
Github Skills (11)
c-language10
3d-graphics10
develop10
cprogramming-language10
qt10
algorithms8
numerical-optimization8
code-optimization8
algorithm8
optimization8
optimisation8
Programming languages (8)
Github contributions (5)
qgis/QGIS
Mar 2022 - Nov 2022
QGIS is a free, open source, cross platform (lin/win/mac) geographical information system (GIS)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:275 reviews, 81 commits, 209 PRs in 8 months
Contributions summary:Jean contributed to the QGIS project by addressing issues and improving the 3D map viewer functionality. They fixed a bug related to depth buffer calculations in the camera controller and also refactored camera navigation mode changes, moving them to the map scene for better parameter handling. Furthermore, the user removed unused functions and structures from the code, streamlining the raycasting and camera controller components. Finally, they implemented several changes to ensure the camera operates correctly, particularly fixing zoom and perspective issues and handling NaN camera parameters.
spatiallinwmsgeotoolsgis
ptitjano/py-qgis-server
Jul 2023 - Jan 2025
QGIS embbeded WMS/WFS/WCS asynchronous scalable http server
Contributions:97 pushes, 19 branches in 1 year 5 months
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