Hi there,
I'll keep it short. I have 14+ years of experience in Web development and after reading your requirements I'm 101% confident I can help you with your task. Just to prove my coding skills, you can test me in any way you want, be it by solving a short but complicated task or answering questions. Moreover, my english is great so you can be sure that there will be no language barriers.
Regarding your project, it can be done in two ways. We can use an MVC Framework and build your website from scratch with a free Admin template or we can include custom designs here made by our in house designer. The result will be a website that will be very secure and fast. The 2nd option would be to use WordPress that has an user friendly Admin where you will be able to create your projects, users etc. I know WordPress has a bad name when it comes to security but given the fact that I'm a no-plugin type of developer, it will be very secure and as custom as possible, as per your needs. The difference between both will be the price and delivery time.
When you're available, let's discuss your requirements in detail and then will check and give you my final quote and ETA as the current bid and timeframe are not set in stone. If we'll decide we're a good fit for each other, we can take it further and get this done ASAP.
Looking forward to helping your reach your goals and build a great business relationship.
Regards,
Kalin Ross