Wordpress & Opencart user synchronization

Having a wordpress site, also running buddypress, that needs to be synchronized with a opencart store. Both running on the same server. They are currently running on a hosted server, but will be moved over to our own server soon, running the smilar softwares and operating systems as found on shared hosting servers (Cloudlinux, Cpanel/WHM and so). It needs to be secure as well as stabel, and the registration/login progress needs to be very easy and work smoothly for our users. Other than that, the way of doing the coding, setup and so will be up to you. Need someone that can be availible for further jobs/maintenance around the coding/synchronization and which can easily be contacted for help. Both the opencart shop and wordpress site has the same look and design. So doing the registration inside wordpress or opencart is up to you, but the best would be inside the wordpress site, as thats the main site, and also where the community will be. There will be times where there can be a high amount of registrations at the same time, so a stable somution is important. If possible, it would be very great to share the login session through both sites. Social logins from facebook, and maby twitter and google would also be a very good thing to integrate (if possible, and not taking to much time). The most important thing is good communication. A person that can tell if somthing will take longer time, if some issues shows up during the coding and developing, so that we can figure out a solution, and get it done in time. As the time frame is very important for us to keep. Give a relevant bid, send some infomation about yourself and maby som earlier work. Please also send a PM message.