Have you had experience working with document-oriented or key-value databases?

Yes, experience with document-oriented databases such as MongoDB or Couchbase allows storing data in JSON-like document formats, which is convenient for flexible data structures and rapid prototyping.

I have also worked with key-value databases like Redis or RocksDB. They are excellent for caching, session storage, or quick operations with simple data.

For example, in an Android application, you can use Realm or Firebase Realtime Database, which are document-oriented and enable efficient data handling without complex schemas.