Version control systems - GIT, Restful Services, Tomcat, Java J2ee, Junit4, Core Java, MySQL, Apache Camel, Oracle, Mongo, Xml, Debuggers, Cloud – AWS, Spring Framework 5, Code Quality Metrics, Profilers, ORM framework – Hibernate, noSQL databases, Logging Framework log4Net, Mockitos, Test driven development TDD, Object Oriented Paradigms, CI CD pipelines, Relational Databases, Software Architecture and Design