I have been with Esri for over 23 years and I had the privilege of working on/with various software products including: ArcGIS Maps SDK for Qt, ArcGIS Maps SDK for .NET, ArcGIS Desktop, ArcGIS Pro, ArcGIS Server, Map Objects, ArcView GIS, and even PC Arc/Info. Currently, I author content on the https://developers.arcgis.com web site helping developers be successful with Esri software.