One limitation of Hazelcast is that due to being a Java-based technology it is mostly focused on supporting applications build around that stack. While we do have a degree of flexibility, in that, other JVM byte-code based languages (such as Groovy or Scala) can utilize the standard Java client driver, but that still does leave a rather large hole for other technology choices. Luckily and very thoughtfully, the cluster nodes do offer limited access to some of our data storage collections in a more compatible way using two popular standards.