Xavier Tassin
Founder at GeoFS
France
Summary
👤
Senior🎓
Top SchoolXavier Tassin is a founder and seasoned software engineer with 16 years of experience building web-first products that blend strong UX, graphic design and performant front-end engineering. He created GeoFS, a widely used web and mobile flight simulator that turns satellite imagery and geospatial data into an accessible training and entertainment platform, and continues to lead both its technical and commercial growth. Previously he led teams building trading, mid-office and risk systems at Flow Traders and architected high-performance front-ends for major enterprises, demonstrating deep expertise in scalable UI architecture. An active open-source contributor, he has worked on the Cesium 3D globe library—implementing GLSL-based atmosphere scattering and terrain lighting improvements—highlighting a practical mastery of 3D graphics and geospatial visualization. Based in France, he combines entrepreneurial grit with hands-on full-stack development and a rare cross-disciplinary fluency between design, avionics interests and complex visualization systems.
15 years of coding experience
13 years of employment as a software developer
BSc, Computer Science, BSc, Computer Science at BSc Computer Science
Stackoverflow
76reputation
744reached
2answers
0questions
Github Skills (12)
webgl10
cesiumjs10
resium10
javascript10
glsl10
shader10
3d9
geospatial9
tiles8
httpwebrequest6
google-closure-compiler6
post6
Programming languages (7)
Github contributions (5)
CesiumGS/cesium
May 2018 - Mar 2022
An open-source JavaScript library for world-class 3D globes and maps :earth_americas:
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:10 reviews, 31 commits, 9 PRs in 3 years 10 months
Contributions summary:Xavier primarily contributed to the Cesium JavaScript library, focusing on core functionality. Their work included optimizing the transformation matrices, implementing features for atmosphere light scattering using GLSL shaders, and adding properties to improve terrain lambert lighting. Furthermore, the user also addressed bugs related to the rendering and appearance of the globe. The contributions suggest a strong understanding of 3D graphics and geospatial data visualization within the Cesium ecosystem.
3d-globegltfjavascript-librarygeospatial3d-tiles
xtassin/cesium
May 2018 - Aug 2022
An open-source JavaScript library for world-class 3D globes and maps :earth_americas:
Contributions:30 pushes, 6 branches in 4 years 2 months
javascript-librarywebgljavascriptearththreejs
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