java : java 8 , java core , collections , oop , solid db : hibernate , jdbc , mysql , postgresql spring : spring core , spring web , spring security web development : servlet , jsp , tomcat , xml tools : junit , maven version control tools : git ( github , gitlab ) ide : intellij idea , visual studio code java : java 8 , java core , collections , oop , solid db : hibernate , jdbc , mysql , postgresql spring : spring core , spring web , spring security web development : servlet , jsp , tomcat , xml tools : junit , maven version control tools : git ( github ,gitlab ) ide : intellij idea , visual studio code operating systems : windows , linux project management tool : atlassian jira , ( scrum , kanban)