Build a crowdsourcing platform for product building and knowledge sharing

Need to build something like [login to view URL] with all the features of [login to view URL] and below 1. An additional category of "Challenges and Queries" where it should have the normal features of a forum. [login to view URL] is a crowd-sourcing platform, but the underlying concepts is still of a forum. The look and feel to be similar to the reference and to be responsive. This is an urgent work, so you are free to chose an stable open source platform which can be customized to be achieve the above features. Or assess the below forum code [login to view URL] and see if this fits. Important NOte : Only people with a capacity of completing the job in 14 days apply and only serious bidders with detailed proposal with relevant web app portfolio (NOT WEBSITES) apply. Please save both parties time.