We have done many marketplace solutions in the past. We understand the buyer/seller scenario and what it takes to make a highly complex marketplace solutions. Check Cuik as an example.
It has got apps (Android and iOS), Seller Panel and an Intelligent Human Turk panel which is a unique concept making it stand apart from other peers.
Well, we are proud with our achievements in this area. We involved into development and handling of one the largest client aquisition and retainship platform which is highly complex with multiple technologies and interfaces.
One of the enterprise level project we did integrated four accountings (QuickBooks Desktop/Online, Xero and Freshbooks Classic) and seven payment gateways (Paypal, Stripe, Authorize.net, PayTrace, USAePay, Heartland and NMI) which was recently showcased earned us great applause from the client as it was a big success for the client to have good pre sales revenues.
We know how to handle complex things here for the entertainment industry. Check a premium solution which created a big buzz in the industry by getting more than 30K users onboarded within the two months of the launch.