Hello Friend!!
Yes according your need magento marketplace we are expert in megento developing. we do m,any projects like market place.
Have a look our skills:
Relevant Skills and Experience
7 to 8 year Experience with
Development Technology: ASP.NET MVC, PHP, Codeigneiter, Java, Joomla,WP,jQUERY
Database Technology: MS-SQL Server 2012 R2
Thanks.
Stay tuned, I'm still working on this proposal.