13+ years experienced Senior Javascript / Frontend Web Developer.I have being developing and testing Web application for more than last 13 years. I'm experienced in different technologies and programming languages.At this moment the programming language i use most of time is Javascript (inc. ES2015) and my main technology stack is:Frameworks:- AngularJS- Backbone.js- Bootstrap- DoJoLibraries:- jQuery- underscore.js- highcharts- xAjaxTask runners:- Gulp- GruntCompiler tool:- BabelBundle tool:- WebpackTest running tools:- qUnit- JasminePackage managers:- npm- bowerAlso, as a frontend developer i use almost everyday:- HTML5, CSS3, SASS, DHTML, XML.I've used a wide range of Database, mainly:- MySQL, SQLite, MongoDB, PostgreSQL.Every day i work with webservices (usually using AJAX), mostly via RESTful, but also i'm experienced in SOAP and XML RPC.I have strong knowledge and practical use Conceptions & Principles:- SOLID- Software Design Patterns- OOP- Functional programming- Material Design- Responsive Design- Mobile First DesignAs a team member I've followed the next methodologies:- Agile (the most), Scrum, WaterFalland developed according to TDD and BDD.I have led teams a few times in my life, usually it was little teams (2-5 people).I would like to emphasize the next tools:: GIT (last 5 years), SVN, JIRA (last 5 years), Bugzilla, Stash, JenkinsI mentioned Frontend and Javascript stack, which i use most on my current position.But in the past, i programmed and used:- PHP: Zend Framework, Symfony, CodeIgnite, Wordpress, Drupal, Joomla, IproactionCMS (co-author), phpBB.- Ruby: Selenium, JET Framework (it's tool which is used by Upwork Engineering QA team for automation regression test).- Java (Android pet projects)There is a huge amount of created web sites from scratch - both low & high load one's in my background. I'm accurate, responsible person who's able to plan both own and team work.