Back-End skill set: Java SE and Java EE(JSP, JSF, Servlet, JNDI, LDAP, JSTL, RMI, EJB, Java Functional Programming: Lambda Expression, JDBC, JPA, JMS, etc), JVM, Tomcat, Weblogic, Oracle, MySQL, PostgreSQL, Spring Framework(such as IoC container, Spring boot, Spring MVC, Spring Cloud, Spring Data, etc), Shell Script, SSH, SCP, SQL, PL/SQL, ERD, myBatis/iBatis, Hibernate, Ant, Maven, Jenkins, Docker, Git, JIRA, XML, WSDL, SOAP, SoapUI, WebService, Apache CXF, Apache POI, Struts, JSON, SVN, Eclipse, SQL_Developer, Node.js, Netbeans, API Design and development, Single-Sign-On framework, Php, word press, etc.
Front-End/Web Browser: PHP, Word Press, JSP, Angular, React, Vue.js, BootStrap, HTML5, HTML/CSS, JavaScript, jQuery, etc
Other skills set: Software requirements specification writing, OOA, OOP, OOD, UML, Domain Modeling, Agile software development, XP programming, TDD.