All Services Programming & Development Schema.org & Semantic SEO expert $60/hr · Starting at $25 Founder of SemanticMarker, an online tool which automates structured data markup of web content. Providing Schema.org and semantic SEO expertise. About $60/hr · Ongoing Download Resume Founder of SemanticMarker, an online tool which automates structured data markup of web content. Providing Schema.org and semantic SEO expertise. Skills & Expertise MarkupSEO 0 Reviews This Freelancer has not received any feedback.