If it's not challenge you, it will never change you.
I graduated as a software engineer and I'm working on Java web technologies with this title.
I have been experiencing with Java web technologies ( Spring Framework, Hibernate, Restful and SOAP web services and other techs likely ) to be a better engineer who always finds out good jobs. Also, I'm working with Oracle Db management and PL/SQL language when I develop Java web projects. Microservices archtitecture, DDD, BDD, TDD, Spring Cloud Technologies, Kafka Messagging, Kubernetes orchestration, Docker images etc.