Joomla Malware Cleanup Expert

I maintain several Joomla sites and some of them have been compromised. I keep finding files injected with malicious code— not just in the root folder but deep inside templates, extensions, and practically every other directory... (Budget: €30 - €250 EUR, Jobs: Content Management System (CMS), CSS, Data Protection, Digital Forensics, Joomla, PHP, Web Development, Web Hosting, Web Security)