If you expect this to grow into a huge platform, as in completely replace LinkedIn, use Django, if not, use MeteorJS. Django will allow you to scale very quickl

If you expect this to grow into a huge platform, as in completely replace LinkedIn, use Django, if not, use MeteorJS. Django will allow you to scale very quickly, as it is more robust. However, the learning curve for Meteor is much smaller and will allow you to get a very modern, reactive application up and running quickly.