Multi-Vendor Marketplace Custom Solution

Looking for a Superstar group of php programmers with ample work experience and examples to prove it to create a multi-vendor marketplace for our company. Site requirements include the following: 10 User types with site permissions set according to each user class. 10 distinct product types, each requiring unique Search/Filter pages and corresponding Results pages. Vendor storefront pages that show and allow for filtering of specific vendor inventories. Instant chat for each vendor. Mass product upload ability for vendors via csv and xls formats. Sitewide Banner Advertising controls for admin and automated banner advertising system for vendors Processing transactions for monthly/annual memberships, advertising campaigns and product sales. Admin back end complete and total control over every aspect of the site. Admin and vendor reporting pages. How to video and explanatory pages And more... Full technical details of every page will be provided. If you have demonstrable experience building multi-vendor marketplace websites feel free to bid on this. You will also need to be able to perform calculations based on the product data and display results in pages. If you think it's a cool idea but need to learn as you go do not bid on this. We expect this project to be completed in a timely manner and according to a strict schedule. We are also looking for robust and 100% compliant coding. Major plus if you can do more than just the most basic layout and design of the information display, we are looking for a new website circa 2018 not 2013. Payments will be released upon completion of pre-agreed upon milestones when we are 100% satisfied with the completed work up to 50% of the agreed project cost. Remaining 50% will be released when finished script is delivered, installed and 100% functioning. We deal directly with technical development supervisor, no marketing go-betweens, we don't have the time to waste explaining things more than once or to someone that doesn't know anything about anything. English at the native speaker level is an absolute requirement for this job, no exceptions. Think twice before sending your canned spam proposal response, that will get you ignored forever. I cannot emphasize strongly enough that we will ask to see your multi-vendor portfolio and if you don't have one you need not bother applying for this job. We are looking forward to hearing from the best that freelancer has to offer, good luck!