Stelios Vitalis
Expert Software Engineer at TomTom
Rotterdam, South Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolStelios Vitalis is an expert software engineer with 13 years of experience specializing in 3D geoinformation, geographic data workflows, and real-world visualization systems, currently finishing a PhD at TU Delft while leading 3D map development at TomTom. He blends research-grade knowledge—authoring CityJSON tooling, a CityJSON QGIS plugin, and versioning mechanisms for 3D city models—with hands-on engineering across web (Vue.js, three.js, GLSL), Python, CAD and GIS stacks. His contributions to open-source projects like a 3D Tiles renderer demonstrate a focus on performance optimizations (raycasting, b3dm parsing) and pragmatic refactors that improve rendering at scale. Comfortable across databases, backend tooling and front-end graphics, he has also delivered requirements and SRS work for international clients such as the World Bank. Colocated in Rotterdam, he pairs academic rigor with product-focused delivery to turn complex spatial datasets into usable, high-performance systems.
12 years of coding experience
10 years of employment as a software developer
Bachelor's degree, Rural and Surveying Engineering, Bachelor's degree, Rural and Surveying Engineering at National Technical University of AthensMaster's degree, Informatics, Master's degree, Informatics at University of PiraeusDoctor of Philosophy - PhD, 3D geoinformation, Doctor of Philosophy - PhD, 3D geoinformation at Delft University of Technology
English, Greek
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (8)
threejs10
tilesets10
tiles10
javascript10
performance-optimization10
render10
rendering10
git7
Programming languages (10)
Github contributions (5)
NASA-AMMOS/3DTilesRendererJS
Aug 2020 - Apr 2021
Renderer for 3D Tiles in Javascript using three.js
Role in this project:
Front-end Developer
Front-end DeveloperContributions:4 reviews, 16 commits, 6 PRs in 7 months
Contributions summary:Stelios contributed to the 3D Tiles Renderer project by implementing and modifying features related to optimizing raycasting and rendering empty tiles. They introduced options to control raycast behavior, improving performance, and addressed issues related to the display of empty tiles. The user also refactored code to improve efficiency, such as the performance of attribute parsing for b3dm files. Furthermore, they fixed linting issues and refactored the codebase.
tiles3dtiles3d-tilestilesetwebgl
tudelft3d/3d-building-metrics
Jun 2021 - Jun 2022
Contributions:120 commits, 85 pushes, 4 branches in 1 year
buildingsgeometriesmetricscompute
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