Verified Expert in Engineering
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.
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
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.
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.
Web and Data Developer
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.
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.
Middle Java Developer
- 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.
Middle Java Developer
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.
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.
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.
Angular, AngularJS, Hibernate, Spring, Mockito, Spring Batch, JUnit, Ext JS, Spring Boot, Jakarta Server Pages (JSP), Ant Design, GWT, Spring Core, Apache Struts, Bootstrap, Express.js
JasperReports, Node.js, Google AdWords, Liquibase, OpenOffice UNO API, AdWords API, AdCenter, REST APIs, Google Maps API, jQuery, Google API
Eclipse IDE, GitLab, Redmine, IntelliJ IDEA, Slack, Cucumber, Git, Subversion (SVN), Skype, Apache Maven, JCA, Gradle, Flyway, Amazon Simple Email Service (SES)
Jakarta EE, Java EE, NetBeans, Windows, Oracle, Heroku, BigCommerce
PostgreSQL, MySQL, Microsoft SQL Server, H2
GitFlow, Google, Validation, Zoho, APIs
Master's Degree in Computer Science
Sumy State University, Department of Computer Science - Sumy, Ukraine