I would like to develop a multi user e-commerce site based on the CS-Cart platform. I require quite a lot of customisation as I want tiered (paid) user groups setup up (site subscriptions), customisable commission structures per user group, checkout to be customised so it is by vendor and the vendor back end simplified. This is a simplified list of what I would like done, but basically I need someone who is proficient in coding and experienced with CS-Cart. I don't want the coding to be hacked together, as this will be an ongoing development project so I would like to have a good working relationship with a developer who would like to continue to be part of this project. Of course, continued development would also be paid but my budget for this entire project is minimal so I am looking for someone that is happy with a monthly payment arrangement rather than lots of bulk billing.
Once the initial marketplace site is configured, I would like to add another aspect to it which would require the add-on of possibly another open source e-commerce platform that accesses the same database. I will discuss in further detail with the web developer.
Payment upon completion of project, but part payment may be possible part way into the project based on progress.
Please provide examples of work you have done, and information on your experience/knowledge of CS-Cart.