@rajesh, thanks for your interest in doing QA! @domenico and @teleivo have been working on QA most recently so they may be able to say off hand where help is needed.
You are right that we are not doing manual testing anymore since all manual tests have been automated by @SolDevelo developers and are run for each build of Reference Application. The most up to date state of our UI testing is described here. We need to update docs on the wiki. Would you like to take care of that?
One area, which we need to tackle is setting up automated performance testing, see here.