I was a web developer until 9 years ago. It was Django & jQuery, but React came with factories of abstract factories, and I happily quit for geospatial development and analysis.
Earlier it was geodata imports from OSM or private sources. Now it's mostly routers and GPS tracks. Interfacing with OSRM & Valhalla via C bindings. Road graph analysis and algorithms. I wrote a router myself, comparing different routing algorithms. I also developed a pedestrian traffic model for entire cities, for retail. I also did various ML models. My languages are Python w/ GeoPandas & CatBoost, Rust, Go.
Earlier it was geodata imports from OSM or private sources. Now it's mostly routers and GPS tracks. Interfacing with OSRM & Valhalla via C bindings. Road graph analysis and algorithms. I wrote a router myself, comparing different routing algorithms. I also developed a pedestrian traffic model for entire cities, for retail. I also did various ML models. My languages are Python w/ GeoPandas & CatBoost, Rust, Go.