Summary: Having to write less code to implement a given feature often improves developer productivity: less code means less bugs, less tests to write, and less artifacts to maintain. Just as recent advances in rich-client technologies reduce boilerplate code on the client, new languages targeting the Java Virtual Machine can yield similar benefits on the server. This article illustrates how Flex on the client, combined with Scala on the server, results in a highly effective client-server development model. The article also shows a way to use the Java Persistence API (JPA) from Scala code.