Oleksandr Nazarenko

Kafka, Java, Kubernetes, Spark, EMR, Cassandra, ScyllaDB, Protobuf, Apache Iceberg (S3 Tables)

Java, Kubernetes, Spring, Kafka, PostgreSQL

Java 11, Kafka, Hibernate, Spring, PostgreSQL, Docker, BPMN (Flowable)

Development of a trading platform. Spring Boot, Hibernate, MySQL, REST, WebSocket, AWS, Spock Framework

Java, Spring (MVC, Integration, ORM), Hibernate, Oracle, Docker, AWS

SwissRe project

Design and development of new features, communication with customers, support of betting mobile applications. Technologies: HTML, JS, CSS, Java, Spring, JSP, Maven, Git, TeamCity.

Development of a message processing platform that creates unique routes for different message types, protocols and workflows; saving, starting, stopping and debugging routes. Deep knowledge of Camel and ServiceMix architecture, custom Camel components, low-level Camel, ActiveMQ and Spring development. Technologies: Spring, Scala, Spring Security, Spring Web Flow, MongoDB, JSF, RichFaces, Maven, Tomcat, ActiveMQ, Camel, ServiceMix, OSGi, HTML, CSS, JS, JUnit, Drools, Jenkins, Git, JAX-WS, JAX-RS.

Design, development and integration of a payment system: connecting it to bank and merchant plug-in, integration with the company's existing web shop infrastructure and preparation for PCI-DSS certification. Technologies: Spring MVC, Scala, Spring ORM, Spring Security, Hibernate, Zkoss, Maven, iText, JSP, JFreeChart, Apache POI, Apache Tomcat, Apache HttpClient, Apache CXF, SSL, HTML, CSS, JS.

Designed, developed and integrated an e-commerce framework and payment processing system; connected payment services with merchant plug-in providers and banks. Implemented account login, transaction viewing/filtering, PDF/XLS export, cardholder management, transaction creation/cancellation, job scheduling. PCI-DSS certification; data encryption, SSL, protection against SQL injection, XSS, CSRF. Tech: Java, Spring MVC/ORM/Security, Hibernate, JSP, Zkoss, Maven, Tomcat, HttpClient, Axis2, iText, POI.