I'd not count Java as a sign that people at a place like strongly typed systems: Java is a default. The typing system has so few features, it pales in comparison with the alternatives. Those that are in a JVM and really care about a type system might be using Scala instead.
And since Morphia (https://github.com/mongodb/morphia) is similar to JPA it is trivial to port your existing code to MongoDB. Which then leaves you with the same experience as an SQL database except with a lot of benefits (single binary, easy to query/administer/scale, geo spatial features etc).