I have been involved with cloudstack since early days. Started as an individual contributor at cloud.com moved on to Cirtix after its acquisition. Right now with Shapeblue who are the leading cloudstack technology company. I have presented the bits on "Writing Cloudstack Plugins" and quality in the previous CCC held at dublin. Over years I have contributed several features and improvements to cloudstack. Some of these are Quota plugin, VM-sync for Xenserver, Dynamic routing in VPC and several improvements to VM-HA.