Google maps javascript API custom development

I'm looking for a javascript developer who has experience working with the google maps js api (https://developers.google.com/maps/documentation/javascript/examples)

Details:

I'm creating a simple map that shows a polyline (documentation:
https://developers.google.com/maps/documentation/javascript/examples/polyline-simple). There are about 50 points (co-ordinates) on my polyline and they represent the journey made by a Delivery truck. Some points are based on a delivery spot and other points are just where the van has turned a corner for example.

The co-ordinates are taken from my json dataset.

What I'm looking for is the following:

- Add Icons to the points on the polyline (https://developers.google.com/maps/documentation/javascript/examples/icon-simple). There are a range of different icons that a point can have based on the category assigned to it in my dataset

- Add tooltip / info window when clicking on a point. (https://developers.google.com/maps/documentation/javascript/examples/infowindow-simple) Again, each point will have different content inside the popup.