Drag and Drop Web Page Builder

We search jquery / javascript experts for a high quality drag and drop web builder working together with a php API (we can help with the php API). Time period is up 30-40 days and Quotation is upon you. Bidders that can show relevant work or examples will be prefered. Features are listed below: - very similar to [login to view URL] & [login to view URL] & wordpress visual composer - drag&drop builder - image/video upload manager for all image upload areas with multiupload & import from facebook and a free image api & search - app store with example app - simple shop with categories - simple blog - shortcode based in the background/database - full feature list is available as text file (will be uploaded soon) It should run at the end like this: - User login into the application - User select a page to edit, drap&drop Editor opens - User will see an option to select a predefined template/layout with elements or a blank page - User can change theme (bootstrap3, bootstrap4 themes and other) - User can Drag and Drop (& click&click) elements into the playing area (header/content/footer in one page) - Elements are parsing over the php api and shows up - Elements have rich submenus and example elements (e.g. the text element, have predefined stylish texts or <h1><h2> tags, the gallery element has different styles...) - User can add new pages and link those with each other - dynamic elements with features like "contact form" which will be linked to email&form entry display with self added inputs/textareas or a "shopping cart" which will surely require product uploading mechanism, or a gallery - The user should be able to edit everything from the element & all avalible css entries for a html tag & element - everything should be live (WYSIWYG), autosave, back button, WYSIWYG editor for text, drag to rows/elements or absolute position or header/footer areas... - shop edit similar like [login to view URL] Looking forward to your response.