@phranck Not from Realm, unfortunately for you! In my case, we've got some in-house sync mechanism that we're exploring alternatives to. Conceptually, if you are able to stream your mongodb changes into a postgresql db currently, you could start to populate that data and get a real example going pretty quickly.

If you do, ask them about their checkpoints... they’re working on ways to let you tell them when a checkpoint is done, letting you keep your existing backend API to send operations