Sergey P.

I build fast, interactive web maps and data‑visualization dashboards for real estate, logistics, utilities, and city‑data products. 400+ completed projects on Upwork. What I deliver: Interactive maps: Mapbox GL / MapLibre / Leaflet / Google Maps / OpenStreetMap—3D, clustering, custom styling, high performance at scale. Data visualization: D3.js, deck.gl, three.js—charts, heatmaps, spatial dashboards that tell a clear story. Geo features: geocoding, routing, isochrones, drawing tools, spatial analysis (Turf.js, OpenRouteService). Full‑stack support when needed: React, JS, PHP/MySQL, API integrations, data scraping/ETL. My process: You share your use case, sample data, and must‑have interactions. I propose scope, architecture, milestones, and timeline (clear definition of done). You get frequent demos and measurable progress Send me a link to your current map (or a reference), sample data/source, and key interactions—I'll reply with a concrete plan and estimate.