Hi,
my name is Matej Basic and I'm a last year student from Croatia, currently living in Portugal, studying at one of the best engineering faculty in Europe - FEUP. I'm also freelancer, mostly working on different web services and apps.
I've read Your project description and I've done similar projects before.
I'm also passionate about HTML5 Canvas (I had it for my bachelor thesis actually!) which can be used in Your project (charts/graphs). Can You tell me, what technology stack did You used for the user system?
If You provide me more information about the project I could send you my estimations and implementation plan. I hope that we'll successfully cooperate on this project.
Kind regards,
Matej Basic