Sure, our source code isn't in Java though. Take a look at our repos and see what you have to offer. Data migration isn't a small thing 
Take a look:
https://github.com/epochtalk/epochtalk
Not sure if this has been discussed before but are you accepting any pull requests at the moment ? I can write end to end tests with jasmine and cross verify if the things are working as they should be.In case of a feature request or a bug,it would only make sense to write code if you're accepting requests..Take a look:
https://github.com/epochtalk/epochtalk