Hello, I am a Linux system administrator working for small and big companies, managing all kind of software, setup and weirdness. I have just down this for a site (not hired using getafreelancer). You need to take offline the site for a while, I need to make a software cycling all your page and removing the malicious code. I can do it easily using PHP or BASH. When finished I try to guess how the infection take place to avoid the repeat of the problem. When all is over, I'll notify google about the problem solved to unmark your website. About me, I am 37, italian (GMT+1), ready to work for you.