This page may be out of date. Save your draft before refreshing this page. Submit any pending changes before refreshing this page. Hide this message . Quora Login Sign Up Twitter Facebook Google+ Science, Engineering, and Technology Technology Software and Applications Computer Programming What should a fullstack developer know in 2015? What languages should we really know? Want Answers 57 14 Answers Quincy Larson , Teacher at FreeCodeCamp.com Teacher at FreeCodeCamp.com 363 upvotes by Joshua Kemp , Tiago Romero Garcia , Christopher Hutchinson , (more) Loading... HTML - the structure of web pages CSS - the visual style of web pages Bootstrap - a "responsive design" tool that helps your websites look great on tablets and phones jQuery/Ajax - an easy tool for controlling content in the browser Chrome DevTools - a tool for understanding and debugging websites, right in your brows...