Looking for Html, JS, CSS expert to help implementing widgets in different websites

We have a product which needs different implementations in various websites.

We’re looking for a team member to work with the media team and help them implement the widget in the required places via javascript which will help us to get higher viewability rate and maximum exposure.

The developer should have full knowledge with native (vanilla) javascript, css and html ofcourse, willing to work on a daily basis an hour or more, depends on the requirements of the media team.