HTML, JavaScript, and CSS Sass (and LESS will be a plus) JavaScript frameworks like AngularJS, React, Ember, Knockout, ThreeJS etc. (Knowledge about ThreeJS is a must) JavaScript-based build tools like Grunt, Gulp, and Bower Libraries like jQuery or Backbone.js Front-end (CSS) frameworks Bootstrap (and Foundation will be a plus) AJAX Back-End API design and development, RESTful Services Web fundamentals like HTML, JavaScript and CSS Server-side languages like Python, Ruby, Java and .Net (Knowledge about Ruby or Python and Java or .NET should be ok) Database technologies like MySQL, PostgreSQL, and MongoDB Web server technologies like Node.js, J2EE, Apache, Nginx, ISS, etc. Frameworks related to their server-side language preferably Express.js, Ruby on Rails (ROR) Others Development experience for both mobile and desktop Understanding of server-side languages Jade, EJS, Jinja, etc. Experience with cloud message APIs and usage of push notifications like SNMP with AWS Knowledge of code versioning tools VSTS, Git, BitBucket Knowledge about on-prem tools like SVN will be a plus Experience working in both Linux as well as Windows based environments Working experience in Cloud-based environments and Container-based Development (Kubernetes and Docker)