Bootstrap developer

Our company requires a bootstrap developer. Functions will be develop some designs or complete existing. Will delivery html, css and js files. We cannot determine how many designs or complexity of work. Conditions: -Worker will use time tracking software and only pay tracked time. -Previous work will do milestone payment on freelancer and only release after deliver work. -Required work will be done in less 5 days or a negative feedback will be published and a dispute opened. Skills: -Bootstrap, Jquery, javascript, Css3, sass, Html5 -Experience with similar works (will require a proof) Abstain not serious people.