Full Text Search integrated, using Couchbase. REST backend tests based on Pytest, integrated with Docker, so you can test the full API interaction, independent on the database. As it runs in Docker, it can build a new data store from scratch each time (so you can use ElasticSearch, Mongo...
has a flexible schema, and is heavily used within Twitter. However, we made this component pluggable. In addition to Cassandra, we natively supportElasticSearch and MySQL. Other back-ends might be offered as third party extensions.