+ Having more than 4 years on developing a real web service on nodejs in a team leader role, that is a social network of real-estate, it is https://nhadatvideo.vn, database is mongodb, server side app is nodejs, webserver is nginx, search engine is sphinx, client side app is a pure javascript with jquery, html5, css3, bootstrap. The system has a big data, and a lot of activity in real-time such as chat, notifications, data input .... + Strong skill on javascript development + Strong skill on tunning performance and optimizing code for heavy load + Strong skill on using google service for storing video, and photo + Strong skill on developing a secue system on both client side and server side in javascript, html5, https : Verifying data input, sanitizer, xss-filters, and other attacking types + Strong experience on developing a chat system written in nodejs, socket-io + others skill such express, redis