I have 5+ years of experience with d3.js building 100+ visualizations. Few of the work at my previous employer
https://visual.ly/users/pykih/portfolio
http://cricket-scorecard.pykih.com/
http://constitution-of-india.pykih.com/
Work Terms
30 hours per week.
$21 per hour
Payment will be in milestones or upfront at the end of the project.