NiFi is what I reach for when data has to move between systems that were never designed to talk to each other, and when the people who need to change that flow are not going to open a pull request to do it.

Five notes: a production deployment on Kubernetes, securing the data flows, two parts on JOLT transformations, and dynamic HTTP listeners with portpxy so a flow can accept traffic on ports that did not exist when the cluster was configured.

A current NiFi deployment, on a platform built to hold it, is in Advanced Platform Development.