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Java expert, with a good knowledge of its ecosystems
Familiarity with concepts of MVC, JDBC, and RESTful/SOAP webservices
Experience with popular web application frameworks, such as Spring (almost all modules), AngularJS, JQuery, Struts, JSF...
Experience with several SQL (SAP HANA, Oracle, MySQL, PosgreSQL...) and nonSQL (mongoDb)
Expert in different Java Persistance APIs (Hibernate, Toplink)
Experience with database refaactoring tools (Liquibase)
Expert in index engines/technologies and log analysis tools (Elasticsearch, Solr, ELK, Lucene)
High understanding of JVM, its limitations, weaknesses, and workarounds
Implementing automated testing platforms and unit tests
Proficient understanding of code versioning tools, such as Git, Subversion, CVS
Expert with build tools such as Maven, Ant
Experience with continuous integration
IT Security expert and secure development expert.
Public Key Infrastructure expert
Apache NIFI expert