Viktor B.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Hello and thanks for visiting my profile! With more than 11 years of experience in Web and App Development focusing on GIS and web maps visualization. I have a proven track record of successfully handling both short and longer-term projects, which makes me a great choice for you. My work schedule is very flexible, as I often work not only daytime EU hours but early morning and late evening as well. Top skills – expert level: ✔ GIS data processing and analysis (Spark, Sedona, GeoPandas, GDAL, PostGIS, QGIS) ✔ GIS data formats (geoparquet, shapefiles, geojson, wkt, pmtiles) ✔ GIS data visualization (Deck.gl, Kepler.gl, OpenLayers) ✔ VisGL (deck.gl, kepler.gl, loaders.gl, luma.gl, math.gl) ✔ 3D data on maps (I3S, 3D Tiles) ✔ Map providers (Mapbox, MapLibre, Google Maps, OpenLayers) ✔ JavaScript build tools (Webpack, Vite, Nx) ✔ Version control systems (GitHub, Bitbucket, GitLab) ✔ JavaScript libraries development and publishing (Npm) ✔ JavaScript, TypeScript, React, Redux, NodeJS, NestJS, NextJS ✔ Python, Jupiter Notebooks Huge outsource experience in big international companies. Work best in both Scrum teams and as a solo developer. Additional skills: ✔ DevOps: AWS ✔ Quality Assurance: Jest, Tape, Vitest, Cypress