- Migrate codebase from Angular 1 to React using: reactjs, typescript, webpack, css modules, react-query, nodejs, puppeteer.- Develop solution for data handling.- Unit testing.- Transform old design to new one.- Create, maintain features for NodeJS API server.- Make features refactoring due to changes in documentation.

- Developed UI library from scratch with ReactJS- Developed a few different projects with ReactJS, styled-components, react-query- Legacy code improvements, migrated to new code base - Wrote unit (integration) tests with react-testing-library and jest

- Developed core components, fixes, and enhancements for legacy projects using React, GraphQL, RamdaJS.- Institute industry's best practices to reduce effort and costs of building and supporting a Bitcoin-based task-and-reward platform. Use VueJS to support an online game platform.- Evaluate potential features based on new and existing design and development needs.- Develop and refactor two React Native group messenger applications using ReactJS and Redux.- Manage multiple projects with a team of designers, back-end engineers, and QA through the complete SDLC in an Agile environment.- Translate design team's UX wireframes and mockups into responsive, interactive features.- Create, maintain, and enforce front-end code and documentation standards.

- Developed and supported legacy SPA build with ReactJS, Sass, and Fluxxor.- Created and maintained several new SPAs with HTML, CSS, ReactJS, Sass, Recompose, Redux, and ImmutableJS.- Designed architecture for multiple projects based on common components with ability to extend their logic.- Developed webpack loaders for internal usage, bash scripts for automation, and third-party widgets to manage SPA build in iframe.- Used React to create an integration SPA for standalone terminal hardware.- Supported multiple language code and theme for various projects.

- Created new UI interfaces with HTML, CSS, RequireJS, Backbone, MarionetteJS, jQuery.- Revamped email templates by converting from HTML to Mojolicious - Perl, which improved email CTR rates by ~25%.- Supported third-party ad widgets.- Worked with Vagrant virtual machine environment.

- developing third party widget for advertising with Vanilla JS;- developing MRAID (Mobile Rich Media Ad Interface Definitions) lib for browsers (to have an ability use same js code in mobile apps and in browsers);- developing administration panel to manage Ads, with requireJS, backbone, marionetteJS, bootstrap.

- converting psd to html, css markup (game design) with jade, less;- automatization process with gulp;- supporting forum (view part);- implementation markup for DataLife Engine;In most cases, I was developing html, css for browser games. Games logic with js. Find best solution for frontend part to avoid performance bottleneck. Rarely, work with forum engine like (phpBB), customize it design, add some custom functionality. Added templates for DataLife Engine.

- Created new interfaces with HTML, CSS, Javascript.- Oversaw and managed the migration from jQuery-based architecture to Backbone.- Divided monolithic scripts to AMD modules with RequireJS.- Implemented and supported Grunt task runner for bundle creation and others client requests.- Migrated from simple HTML strings in SPA to HandlebarsJS templates.

- converting psd to html, css markup;- improving existing markup;- provide сross-browser compatibility (ie6+, etc.);- inject javascript UI elements into markup;

- supporting windows based server;- resolving payments errors on AXA insurance site;- supporting hard ware equipment;