Sergey Ponomarev

As a Java Backend Developer, I developed an Amazon-like marketplace website for Switzerland, Germany, and Austria. Used: Spring Boot, REST, GraphQL, Hibernate, MariaDB, Cassandra, Kubernetes, AWS (S3, SQS) Team size: 5, Scrum

I worked on the Payment Gateway, User Auth and KYC modules. • Integration with Payment System Providers (PSP) and Credit Card Processors and API development. • Build process and CI improvements. Solved a Dependency Hell. • Performance, security and UI improvements. • Migration to microservices and dockerization. • I was in the role of Team Lead for about a year. Used: Spring Boot, REST, Hibernate, PostgreSQL, MSSQL, TeamCity, Docker, Node.js, Scala, Bootstrap Team size: 6, Kanban

Sanctri was a Facebook application with Grails backend and SPA design built with Backbone and Underscore.js. I significantly improved performance, test coverage, and maintainability. Used: Spring, Groovy, Grails, Hibernate, JodaTime, Quartz, JMS, Spring Security, Liquibase, Spock, Geb, Selenium, jQuery, PostgreSQL, Backbone, Underscore, AWS S3

Gramant is a company that developed several CMS and ERP. I worked on a project for hh.ru Used: Grails 2, Tomcat, Quartz, Spring Security, Liquibase, Spock, Geb, Selenium, jQuery, Jira, TDD

Hotwire is a discount travel website. As a backend dev, I created a few internal tools and subprojects. Used: Spring, Tomcat, FreeMarker, Mockito, JPA, EclipseLink, Oracle 11g, Maven, Perforce, Jenkins Team size: 8, Scrum.

NetCracker is a Telecom Operations System. I was a JavaEE developer at the Implementation Engineering department. Worked on integration with external systems of Telecom providers via APIs. Used: JavaEE, WebLogic, WebServices, Axis, SoapUI, JMS, Ant, JUnit, ClearCase, Oracle, Linux.

I took part in several ERP projects but most notable was a document management system for Ukrainian courts. I developed a system of automatic distribution and scheduling causes for judges. In three months I successfully implemented a complicated algorithm that was described in 38 pages. Used: Delphi, Firebird, IBExpert, DevExpress, DUnit, XMLDoc, AQTime, EurekaLog, SVN, Jira

Control systems engineering, programming