Good English skills are necessary, German is a plus while not neccesary...GMX, WEB.com and over 43 million active users, we are the leading email and communications platform in..You have sound knowledge in object oriented programming with Java and web technologies such as JSON or..You have experience with Linux as a development- and server environment in high load scenarios as well..software quality assurance (Unit Testing, Performance Tests, Acceptance Tests) and agile development in