Oleksii Teterin, JavaScript Developer in Lviv, Lviv Oblast, Ukraine
Oleksii Teterin

JavaScript Developer in Lviv, Lviv Oblast, Ukraine

Member since April 14, 2014
Alexey is a top developer capable of developing efficient, scalable, and fault-tolerant server solutions for complex problems. He has extensive experience with all levels of software and architecture. Programming is his passion. He loves speed, performance, and optimal approaches.
Oleksii is now available for hire




Lviv, Lviv Oblast, Ukraine



Preferred Environment

WebStorm, Git, Windows, Linux, MacOS

The most amazing...

...app I've created is an interactive tool for exploring the beauty of fractals.


  • Senior Software Developer

    2014 - PRESENT
    EPAM Systems Ltd.
    • Created a web portal for medical institute using AngularJS.
    • Supported a management portal for one of the world's top sportswear manufacturers.
    • Created a testing framework for use in existing and new projects.
    • Implemented generation of server side pages for an SPA project using AngularJS.
    • Implemented auto-detection of user location using geolocation with fallback to a detection by IP address.
    Technologies: JavaScript
  • Senior JavaScript Developer

    2011 - 2014
    Master of Code
    • Implemented a complex project with 3 web services and a web portal.
    • Developed a mobile application on PhoneGap using Sencha Touch for iOS and Android platforms.
    • Participated in the development of the front-end of 5 websites.
    • Created a slidecast player with audio.
    • Developed an interactive video player and web editor for preparing the necessary video.
    Technologies: Sitecore, ASP.NET, Titanium, PhoneGap, MongoDB, Node.js, JavaScript
  • Web Developer

    2009 - 2011
    • Mastered Ext JS and used it on a creation admin panel for 5 web sites.
    • Implemented a Xapian Search Engine for theevolutionstore.com.
    • Developed 8 web sites.
    • Created an image tool library on PHP for resizing and cropping.
    • Learned to write clean, readable, and reusable code.
    Technologies: MySQL, Zend Framework, PHP, jQuery, Ext JS
  • Web Developer

    2005 - 2009
    TWS Solutions
    • Developed 6 web sites.
    • Created a world map on Adobe Flash.
    • Acquired experience with MS SQL, SQL procedures, and triggers.
    • Developed fully functional single page sites using jQuery.
    Technologies: Microsoft SQL Server, ASP.NET, ASP, jQuery, JavaScript
  • Software Developer

    1996 - 2004
    • Created an application for entering, storing, ordering, and printing text with special metadata. Used the platform DOS, Turbo Pascal language, Turbo Vision library, and OOP paradigms.
    • Created an application on MS Access for storing and manipulating text for a publishing company.
    • Created an application for entering, validating, and collecting a special type of financial data using Delphi.
    • Created an interactive financial calculator on Flash for calculating different loan values over time.
    • Created a pure AJAX-driven web site, before jQuery was released.
    Technologies: Delphi, Visual Basic for Applications (VBA), SQL, JavaScript, PHP, Adobe Flash


  • HouseTab

    HouseTab is a mobile application for payment in bars and restaurants, socializing with friends, sending goodies to friends, and receiving deals.
    I was responsible for the back-end REST API and Owner Web Portal, both written in Node.js and using MongoDB and Redis.

  • Interactive Video Player

    Interactive Video Player is a system allowing users to create interactive videos based on the existing video file or video stream. It consists of a wizard enabling users to upload video and add interactive elements, and a HTML5 video player for embedding interactive video to any web page. Users can generate the embedded video with banners, links, questionnaires, and selectable areas, as well as create endless video chains using links to other embedded videos.
    I was responsible for the front-end, video player, interactive elements, and video creator.

  • Object selector system

    A web application for collecting, organizing, storing, and selecting/searching objects (especially 3D models and texture files). The application has a control panel for organizing and storing a collection, and has a public part for selecting/searching, previewing, and downloading objects by tags and key words.

  • Superwijnen

    A mobile application for iOS. This app helps users to easily find the best wine and wine offers in the supermarket. It can scan a wine for a score or discover a new wine from the simple filter function. Technologies used: JavaScript, Appcelerator Titanium SDK, and SQLite DB.

  • Fractal explorer

    An interactive fractal explorer tool capable of changing a fractal's formula and deep diving into the beauty of fractal patterns.

  • Game of Life

    A JavaScript implementation for Conway's Game of Life with an unlimited grid size and high performance speed.


  • Languages

    HTML5, JavaScript, CSS3, SQL, JADE, Less, Visual Basic for Applications (VBA), Delphi, C#, PHP
  • Other

    Back-end Development, Sitecore, SVG
  • Frameworks

    Flux, Bootstrap, Express.js, AngularJS, ASP.NET, Zend Framework, ASP, Ext JS, Sails.js, Sencha Touch, PhoneGap, Titanium
  • Libraries/APIs

    React, Node.js, jQuery, Sinon.JS, jQuery Mobile, Backbone.js, jQuery UI
  • Tools

    Mocha, Grunt, Bower, Gulp, Adobe Photoshop, Adobe Fireworks, Mongoose, Adobe Flash, Git, CasperJS, Karma, NPM, WebStorm, Vim Text Editor, Canvas
  • Paradigms

    Object-oriented Programming (OOP), Agile Software Development, Functional Programming, Model View Controller (MVC), Test-driven Development (TDD), Scrum
  • Storage

    MongoDB, Redis, MySQL, Microsoft SQL Server
  • Platforms

    MacOS, iOS, Android, Windows Phone, Windows, Linux


  • Master's Degree in Physics, Mathematics
    1991 - 1996
    Cherkasy National University - Cherkasy, Ukraine

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