Senior GIS developer on Mapbender — vis-ui.js, Digitizer, public-sector geoportals.

YAML-configured browser editing for points, lines, polygons — 344 commits on mapbender-digitizer.

~1,900+ commits — VisBack/VisCMS, Magento shops, produktor.io geospatial line before current platform.

Senior Software Developer — million-record RDBMS tuning, Java APIs, Tcl/Tk components.

Subcontractor for GRID agency (gridfactor.de) — PHP/MySQL microsites, Flash campaigns, VisCMS stack.

Fachinformatiker apprenticeship at D2S/SYSTEMS GmbH — LAMP, D2S/CMS, König-Neurath, Mendel.