Csaba Ijjas

Migration and Modernization of Telkom Services - 1&1 Created a new environment, migrated the system from the JBoss environment to Wildfly, developed the endpoints using OpenApi and Jakarte EE frameworks. Scheduling procudure renewed with Quartz scheduler. Upgraded Java version, optimized the code and addressed security vulnerabilities. Sybase, Java, Hibernate JPA, REST api, Quartz, JUnit5, Ovacle VM VirtualBox, IntelliJ, Git, Maven, Wildfly, Docker, Kubernetes, Jira, Jenkins, SonarQube, Swagger

Migration of a Voice-Over-IP Service at 1&1 Migrating the business logic associated with REST API endpoints, replacing the RMI calls, from the original application to the new environment. The Java version upgrade (from 8 to 17), code optimization and addressing identified security issues, with assistance from SonarLint. Sybase, Java, Spring Boot + Data, Hibernate JPA, REST API, JUnit5, Oracle VM VirtualBox, IntelliJ, Git, Maven, Wildfly, Docker, Kubernetes, Jira, Jenkins, SonarQube, Swagger.

Development and maintenance of entitlement service Developing REST API service for entitlement queries in a microservices environment. Design, develop, test, deploy and contact with UI developerts and with users, support. Synchronizing data between DB2 and Sybase. Using an own developed data-driven script langugage managing the scheduled tasks. Developing new functions. Java, REST API, Spring/Spring Boot, SonarQube, Gradle, Ivy, Git, Bitbucket, Jenkins, Jira, MySQL, DB2, Windows, Linux

Developing Foreign Exchange softwares Used technologies: CloudBees, Jenkins, GitHub, Maven, Oracle SQL, JIRA, JFrog Artifactory, Windows, Linux PriceEngine: FX Quotes streaming from various source to own/3rd party portals Java, Eclipse SalesUI: Salesperson interface. Adobe AIR/Actionscript, IntelliJ

WEB UI developing with server support Using GWT, CSS, MySQL. In Linux, Eclipse, Gradle environment

Developing of systems for driving licence, Hungarian ID, address card, Hungarian State Holding Company Developing of archiving solutions for ONYF and KEK KH Giro Interface System, Securities system, Globus (MKB - Hungarian Foreign Trade Bank), IBS OS: AIX, Windows, Linux Java, Adobe AIR/ActionScript 3.0, Flash, C, C++, PL/SQL, Unix script, Pascal, Prolog, Magic, JBase, Aims Eclipse, Microsoft Visual C++, Adobe Flash CS4, Oracle developer, ARC/INFO Oracle, Tivoli Storage Management, Ingres

GIS (Geographic Information System) main program (GREENLINE) developing, optimizing and managing database.