Java/Scala Expert

Development experience on the JVM, including asynchronous I/O, concurrency, and the Java memory model. Experience with software engineering best practices and expert knowledge of java and scala.

Strong algorithms, data structures and coding background especially in Java and Scala; Development experience on the JVM, including asynchronous I/O, concurrency, and the Java memory model. Familiar with debugging tools such as JStack, JMap, JHat, gdb. Experience with software engineering best practices (e.g. unit testing, code reviews, design documentation, tdd) and disciplined approach to testing, quality assurance and documentation Expert knowledge of Java (>1.5) and the Wicket web framework. Experience with web infrastructure, distributed systems and message driven architecture

Expert knowledge in Java and Scala
Good experience in PHP, Javascript, Less, Css and HTML5

some frameworks i use in my daily business:

Web-Frameworks: Apache Wicket, Apache Isis, Play Framework, Vert.x, Netty, resteasy, Qooxdoo, jQuery, Twitter Bootstrap, Twitter Flight, require.js, Backbone
Test-Frameworks: JUnit, Mockito, Hamcrest, Contiperf
Frameworks: Akka, Spring, Hystrix, Guava