Technology : 

MEAN STACK 

MEAN is collection of javascript based technology where 

M stands for MongoDB

E stands for Express.js

A stands for Angularjs

N stands for Nodejs

 These technologies are used to build Web application. From the client and server side to databases, MEAN is full stack development toolkit for Web development.

MEAN stack developers are currently most sought after developers and their salaries are also more than average.

More details on 

https://www.sitepoint.com/introduction-mean-stack/