Dear,
As a GIS Specialist with Over 12 years experiences in GIS field, I can Assure your Support and Assistance for All Tasks related with Web GIS especially open source.
*Spatial database: PostgreSQL/ Postgis: Transfer Spatial data eg Shapefile , geodatabase to PostgreSQL, Create Vues, Stored Procedures
*Advanced Skills in Geoserver: OGC Web services( WMS, WFS, Vector Tile, WMTS), Styling GIS data for web( SLD, Carto CSS)
*Advanced Skills in Openlayers/ leaflet: Create a map view, Map controls, Layer Switcher, Overview Map, Scale bar, Popups Query etc.
* Stong Skills in QGIS
If you're Looking for Full Assistance in Web GIS Open Source Then You can Ping me.