React + MapLibre + PostGIS developer for an internal land-parcel map (fixed price)

We’re a small energy development consultancy. We need a full-stack geospatial developer to build a simple internal web map for finding and tracking land parcels. It’s a lightweight, in-house version of tools like Paces or LandGate. Fewer than 10 people will use it, and it’s not a product we sell. What it does: - A fast map with satellite and street basemaps, parcel boundaries, and free public layers (transmission lines, substations, wetlands, flood zones, terrain) that users can switch on and off - Loads parcel data from our paid parcel data provider, plus files from free county downloads - Import, draw and export full KML/KMZ files (names, folders and styles kept), so we can stop using Google Earth for this - Search and filters (acreage, zoning, distance to a substation or line, drawn area) - A side panel per parcel with notes, attachments and an editable status, so the team can keep a shortlist - Exports to CSV, shapefile and GeoJSON - Simple email login for our team There is also a small optional add-on: exchanging files with one of our internal tools and showing its results on the map. It’s quoted separately. Stack we lean toward: React, MapLibre GL JS, Supabase (Postgres + PostGIS), Vercel or Netlify. We’re open to a cheaper approach if you have one. You should have: - Shipped at least one map app with MapLibre or Mapbox GL that handles tens of thousands of polygons - Solid PostGIS skills and experience importing KML/KMZ, shapefile and GeoJSON data - Supabase or a similar Postgres backend Nice to have: land, real estate, energy or agriculture GIS work. How we work: one fixed lump-sum price. After a short chat/meeting, shortlisted candidates receive the full scope. The code and all accounts belong to us. AI-assisted development is fine.