QuickBlox has recently added the support for Kafka (pub-sub queue / messaging system).
We have made our Chat server write to Kafka so that it is easier for our enterprise users to apply analytics, trust & safety and external systems and tools to chat server generated data.
We have also enabled SSL encrypted connection via AWS load balancer so that you can connect Kafka consumers via a secure HTTPS connection.
This solution has been adjusted and tested to work in a scalable environment so that X Kafka brokers can work with Y Chat servers controlled by Z Kafka ZooKeepers. You may also connect multiple consumers if required. This is very useful for backup, analytics and real-time reaction / integration systems.
The configuration depends on architecture and scalability factors but here is an example diagram (clickable) showing the principal scheme.