Oleg Zorin

Project Description: Global payment service. Large enterprise system intended to make and manage payments and do it with reducing operational costs but very efficiently. Project is based on subdomain services launched in AWS Cloud with relations to common DB - PostgreSQL. Services use Java 17, Spring Boot and Hibernate as ORM. UI is based on Vaadin Java framework and Angular as Single Page Application. CI/CD is constructed on GitLab and Jenkins Pipelines.

Project Description: Global platform for management of payroll, payments and workforce administration. Large enterprise system intended to manage payroll, payments, workforce with worldwide support by lawyers, accountants, etc. Project is based on small subdomain oriented multilanguage services launched in AWS Cloud with relations to common DB - MariaDB. Java based services are used Java 11, Spring Boot and Ebean as ORM. UI is based on Angular and React pieces of Single Page App. CI/CD - GitHub Actions.

Project Description: Web platform for management services of wireline and wireless networks. Large enterprise project based on many web servers with single per instance application intended to have a platform for managing services of telecommunications provider that provides wholesale carrier services to wireline and wireless operators and service providers globally. All web services have own Tomcat server and involve to a web application by means of Reverse Proxy on Apache HTTP Servers. JSF+Richfaces.

Project Description: Selling platform for travel agents and tour operators. Huge enterprise project with SOA intended to have a platform for booking of airlines, hotels, cars and railways to travel agents, search engines and tour operators. On the one side, the project consists of many services on C++/Python, which are orchestrating via ESB. On the other, a single page app, which allows of using those services and their functionality. The SPA is based on JavaEE technologies - EJB, CDI, JMS, JPA, Struts.

Project Description: Web platform for creating and delivering Media content. Large enterprise project intended to create and deliver a wide range of multimedia-rich content to an audience across multiple television, web, mobile, and social media channels. Project is service-centric. However, it was OSGi services at first time and stand-alone services with ESB now. Basically, services were created on Java and Node.js. Project also has UI and linked services for representing data from ESB.

Project Description: Web application in banking domain. Enterprise project intended to provide for commercial solutions in banking domain. Project is a classical implementation based on Enterprise Java. The application uses JSF and RichFaces for representing data on UI and EJB beans on backend side.