Google Maps Drawing & Editing Infrastructure Needed

I need an experienced JavaScript / Google Maps API developer to lay down the core code for an in-browser map editor that feels closer to an AutoCAD workflow than the usual “drop a pin” tool. The focus is on creating a rock-solid, extensible foundation that my team and I can iterate on later... (Budget: $250 - $750 USD, Jobs: CSS, Frontend Development, Geographical Information System (GIS), Google Maps API, HTML, JavaScript, Telecommunications Engineering, UI / User Interface, User Interface / IA, Web Development)