Data visualization and Mapbox gl, google maps, leaflet.js developer

Hello.
My name is Serg and I am a full-stack web developer from Ukraine.
I am specialized on doing maps with mapbox, leaflet, google maps api, openstreet. I have about over 100 projects on Google maps, mapbox and leaflet api (markers, filters, QGIS, geojson, geocoding and so on and on).
Data visualization with D3.js
So if you need a map - you came to the right place.
My profile on Upwork map developer

Some of my projects:

Google maps API
The task was to create a map with an option to save a map as jpeg image and an ability to create such custom markers with infobox.
Google maps API
Create a tree of markers from the csv file.
Calculate the number of markers inside the polygon or circle.
Mapbox Gl JS API
Use clustering and some dropdown filters for pins(markers).
Create an api to select the pins from the db(PHP+mysql)