The product of the company is a payment system and gateway (unipaygateway.com).This solution is designed to serve as a payment processing, recurring billing system, relationship management and merchant management platform. Responsibilities: - writing tests to control correctness of working product's API (using jUnit framework);- developing integration tests; - providing regular testing and monitoring results; - providing operations to work user's permission system properly; - bug fixing;- maintaining internal resources such as creating tasks in Jenkins;- deploying branches to test servers for providing tests before patches and releases.Technologies and tools used: EJB, Hibernate, Spring Framework, Apache Camel, Apache ActiveMQ, ZK UI framework, MySql, Ant, Subversion, JBoss, Jenkins.

Web-application for Rooftop Energy Company (Netherland). The application gives users of solar panels (regular customers, schools, small businesses, municipalities etc.) deeper understanding of the performance of solar panels, their productivity and practical use.Responsibilities, back-end: managing database, implementing Spring security, creating persistance layer and REST servises, managing process of deployment project to OpenShift, code review, fixing bugs.Responsibilities, front-end: developing DOM model, implementing widget to get weather forecast and the other information about consumption and producction energy, tuning application appearance by CSS, fixed bugs. Technologies and tools used: Spring Framework, RESTful, JPA/Hibernate, MySQL DB, JavaScript, HTML5, CSS3, JQuery, Git, Maven, JUnit, Tomcat, JIRA.Link to the source code: http://github.com/AIakovenko/RooftopEnergy

The application was developed to manage Housing Office staff. The application is based on Java Servlet/JSP technologies (http://github.com/AIakovenko/Department).

Preparing drawings and documentation to produce furniture and interior elements.

Mechanical and electrical design control panels of aircraft systems (cockpit). Preparing drawings and documentation to produce aircraft.