Andrii Mysnyk, Software Developer in Sumy, Sums'ka oblast, Ukraine
Andrii Mysnyk

Software Developer in Sumy, Sums'ka oblast, Ukraine

Member since September 7, 2016
Andrii is a hard-working and innovative full-stack Java Developer with over 5 years of experience in a variety of back-end and front-end technologies including Java EE, Spring, Hibernate, JUnit, SQL, Ext JS, AngularJS, Node.js, HTML, and CSS. Andrii fearlessly takes on new challenges and prides himself on his responsibility, friendliness, and a willingness to collaborate and help fellow colleagues.
Andrii is now available for hire




Sumy, Sums'ka oblast, Ukraine



Preferred Environment

Slack, Skype, Windows, GitLab, IntelliJ IDEA

The most amazing...

...thing I've worked on was a large, fast-paced project on internet advertisements that leveraged several modern technologies.


  • Angular Front-end Engineer

    2020 - 2020
    MediOne GmbH (via Toptal)
    • Refactored calls to the updated API.
    • Updated legacy sections to display data from the updated API.
    • Developed new pages and sections.
    • Fixed bugs in legacy code.
    Technologies: Spring Boot, Bootstrap, Maven, H2, TypeScript, JavaScript, CSS, HTML, Angular
  • JavaScript Developer

    2019 - 2019
    Natural Waterscapes, LLC (via Toptal)
    • Implemented a polygon drawing on Google Maps.
    • Integrated Google Maps into Zoho Form.
    • Integrated the upgraded Zoho Form into a BigCommerce page.
    Technologies: Zoho, BigCommerce, Google Maps API, JavaScript, CSS, HTML
  • Web and Data Developer

    2017 - 2018
    Mettle (via Toptal)
    • Developed a cron job that downloads XML files from a government site and populates a local database every day.
    • Created a back-end server on Node.js.
    • Created a front-end application on AngularJS.
    • Implemented search based on survey results, location, and advisor details.
    • Implemented user registration and office claiming with a profile setup workflow.
    Technologies: Heroku, AngularJS, Express.js, PostgreSQL, Google Maps API, Node.js, SQL, XML, CSS, HTML, JavaScript
  • Java Developer

    2016 - 2016
    Prospect Hill Advisors (via Toptal)
    • Implemented back-end architecture using Spring controllers, services, and repositories.
    • Wrote database migration scripts and implemented Hibernate model classes.
    • Developed a REST API for communication with front-end services.
    • Wrote tests to cover all logic.
    • Developed front-end architecture using AngularJS.
    • Implemented design elements using AngularJS modules, jQuery, and Bootstrap components, and style attributes using a CSS Bootstrap theme.
    • Extended jQuery components with additional functionality to meet design needs.
    Technologies: Maven, Spring Core, Validation, REST APIs, JavaScript, CSS, HTML, Bootstrap, jQuery, AngularJS, Mockito, JUnit, AWS SES, H2, PostgreSQL, Hibernate, Flyway, Spring, Spring Boot, Java
  • Middle Java Developer

    2014 - 2016
    • Developed new functionals for a billing system.
    • Implemented UI forms for new functionality.
    • Fixed bugs and communicated the solution to consumers.
    • Renewed the UI with Ext JS library to make it more usable and beautiful.
    • Improved SQL query execution time from several hours to a matter of minutes.
    • Developed UI forms on AngularJS.
    Technologies: Maven, Git, CSS, HTML, Node.js, AngularJS, jQuery, Ext JS, JavaScript, Oracle, Apache Struts, Java
  • Middle Java Developer

    2012 - 2014
    Global Digital Marketing Solutions
    • Developed facades for new ad providers.
    • Updated API libraries for existing providers.
    • Developed new modules for gathering call tracking information from different providers through their API.
    • Wrote unit and integration tests (Cucumber) on all levels and for different scenarios.
    • Developed UI forms for new functionality.
    Technologies: Maven, AdCenter, JasperReports, Git, Subversion (SVN), AdWords API, Google, Ext JS, Liquibase, Groovy, Gradle, Cucumber, Mockito, JUnit, MySQL, Hibernate, Spring Batch, Spring Core, Java
  • Java Developer

    2011 - 2012
    Effective Solutions Group, Sumy
    • Developed a system for secure document sending.
    • Developed a Java applet for encrypting and decrypting documents and transferring between clients.
    • Improved SQL requests to obtain better performance.
    • Investigated and implemented a protocol for electronic invoice transfer.
    • Implemented XML protocols to communicate between different parts of a system.
    Technologies: Maven, Java, JCA, Microsoft SQL Server, CSS, HTML, JavaScript, GWT, Java EE
  • Senior Assistant

    2010 - 2011
    Sumy State University, IT-Center
    • Installed and integrated a DSpace project for the university library catalog.
    • Supported the university library catalog.
    • Improved the catalog with additonal information and specific workflows.
    • Improved productivity and implemented a statistic module.
    • Implemented an articles parser for JNEP journals for an automatic filling database and sent external catalogs like DOAJ.
    Technologies: OpenOffice UNO API, Ant, Maven, PostgreSQL, MySQL, XML, PHP, JSP, Java EE, Java SE



    A website that provides information about financial advisors and allows for search of most suitable advisor by a set of parameters and location.


  • Languages

    CSS, HTML, JavaScript, Java, XML, SQL, TypeScript, Java SE, PHP, Groovy
  • Frameworks

    Angular, AngularJS, Hibernate, Spring, Mockito, Spring Batch, JUnit, Ext JS, Spring Boot, JSP, GWT, Spring Core, Apache Struts, Bootstrap, Express.js
  • Libraries/APIs

    JasperReports, Node.js, Google AdWords, Liquibase, OpenOffice UNO API, AdWords API, AdCenter, REST APIs, Google Maps API, jQuery, Google API
  • Tools

    Eclipse IDE, GitLab, Redmine, IntelliJ IDEA, Slack, Cucumber, Git, Subversion (SVN), Skype, Maven, JCA, Gradle, Flyway, AWS SES
  • Platforms

    Jakarta EE, Java EE, NetBeans, Windows, Oracle, Heroku, BigCommerce
  • Storage

    PostgreSQL, MySQL, Microsoft SQL Server, H2
  • Other

    GitFlow, Ant, Google, Validation, Zoho
  • Paradigms



  • Master's Degree in Computer Science
    2007 - 2012
    Sumy State University, Department of Computer Science - Sumy, Ukraine

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