@alberskib about angulillos is something similar to scarph in some sense; it is (I think) close to the limit of what you can do in Java. We are polishing a new Java version of the main Bio4j distribution based on it. It would be nice to implement a DynamoDB backend for it. If you are interested we could think a bit about it, it should be pretty easy; we could also use it as an idea for GSoC15