- Java Development: Java Core, Collections, OOP, Design Patterns, JUnit.

- Databases: JDBC, Hibernate, RDBMS (PostgreSQL, H2, MySQL)

- VCS: Git, GitLab, CI/CD

- Web Development: Servlets, Tomcat, JSP, HTML/CSS, XML, JSON, JSTL

- Spring: Spring Core, Spring Web, Spring Security, SpringBoot

- Tools & Libraries: Maven, JUnit, Mockito

- Operating systems: Windows

- IDE: IntelliJ IDEA