A homepage and user profiles with financial features

Hello, I need a developer, preferably a java expert with designing capabilities. I have already a platform written in java and it is perfectly working, but I need an attractive homepage and user profiles with financial features (my servers are ubuntu). These can be a separate website or these can be integrated into the current platform, we can decide about this later. It must be an attractive homepage, if you prefer, we can use a ready responsive template (or a responsive cms template, for example joomla). I need customer and freelancer profiles. Customers can buy credits via paypal, monebookers and google wallet and they can post projects. And freelancers can earn credits on project basis. At the end of the month, there will be an automatic payment to freelancers. There is one more thing I need but I can not tell it publicly. Also, it is not for sure now. We can talk about further details and we can finalize the price during interview. Because I have two bad experiences here, I will not accept any milestone payment requests. Because, I don't want to lock my money for nothing and wait and wait and wait for nothing again. Your payment will be done in full, after you complete the project successfully. 100% GUARANTEED. But, sorry, no milestones. This is to urge you to do my work. If you do not do anything for my project for a long time, your assignment will be terminated and will be given to another person who can really do it. I am looking for a friendly and LONG TERM work relation. Thank you