Maintenance of WordPress website

I need website developer to help me maintain my website site and customized some plugin.  My website has a banca theme. The will features (1) Online banking wallet with different saving projects and loan .(2) The MLM Investment plan which will serve as bedrock of the securing loans (3). E-commerce this is online shopping were customer can do shopping both on loan and cash. (4). Blogs this is where info about the company, forex market, economy new, jobs advert and application will be display. Any interested expert should apply for more information.