Hello.
I am a GIS(Geographical Information System) expert and senior Web&Mobile(iOS, Android and React Native) developer as well.
I graduated GIS education course and I have rich experiences in a lot of Desktop, Web and Mobile GIS applications.
As a GIS developer, I can develop any kind of GIS application based on ArcServer, GeoServer and GoogleMaps, OSM, MapBox, OpenLayers, PostGIS and PostgreSQL and MS SQL, SQLite/Spatialite.
And I have many Web technologies such as PHP, Java, C#, NodeJS etc.
I've checked your requirements and I am very interested in your project as I've worked on many GIS application developments and I think that I can realize your requirement.
I would like to hear from you.
Thank you.