ionic app using angular and leaflet

Hi, We want to develop a app using ionic 4 + cordova + angular JS using openlayers or leaflet. 1. one page with showing interactive map OSM or google as background 2. map showing users gps location as marker 3. Start button will track/logs the position of user as they walk, show line/polygon on screen 4. On stop button display area and save the polygon in KML/shapefile/database 5. On user click/touch add Point of interest while tracking with pop up to enter the name of the POI 6. Add KML/shapefile/database into map Please contact only if you have experience with this technology. Quote specifically number of hours or fixed price.