D3.js2 years experience
I've developed both big and small d3 graphics, from small uninteractive sparklines to large full-page mini apps taking data streaming in from a react app.
React2 years experience
I've developed large complex data-heayv apps based in react, using react to manage the state of components using other libraries (Leaflet and d3 for example)
Leaflet2 years experience
I've integrated leaflet into existing apps, not just showing a set of points but developing custom plugins, skins, and working with streaming data.