create a full responsive join page plugin for our skadate website !

we are looking for a join page plugin for our skadate latest version website like attached image . it must be full responsive , clean , professional , optimize for seo and loading speed , if we install additional language installed in our site language changing option must be come , connect buttons should be automatically align . We are currently using sign in page as landing page . our website url is attached in this screenshot . " [login to view URL] " we also have test site to develop . so we will give the test site access to develop the plugin .