Can I use MongoDB 3.4+ WiredTiger as a back-end for Appsmith?

This question was asked by one of our community members on Discord:

Can I use MongoDB 3.4 + WiredTiger as a back-end for Appsmith? I am limited by the available managed service from our cloud provider (Help Center) and that’s why I’m stuck with such an ancient version…

We are currently using a MongoDB statefulset when deploying to K8s, but we would prefer a more reliable (managed) solution, especially regarding automated backups and redundancy.

The recommended version currently is 4.2 or 4.4. I’m not sure how it would behave with version 3.4, but it’d be hard to support and troubleshoot. Another option is to use MongoDB which comes as part of the Appsmith image, and will always be a supported version.