I’ve used Realm for this very successfully. It is a bit limited in the number of languages it supports (outside of mobile where it seems to support pretty much

I’ve used Realm for this very successfully. It is a bit limited in the number of languages it supports (outside of mobile where it seems to support pretty much everything), but it has really nice support for node.js and .net which is where I have used it. It is pretty cool to be able to share live interconnected objects between processes with full transactional safety.