Consider using RabbitMQ

[erdenezul]

RabbitMq could be used in background process and subscriptions.
htstps://github.com/cdmbase/graphql-rabbitmq-subscriptions

[shinebayar-g]

I'd definitely suggest to reconsider redis usage here. Redis is general purpose key value store, it has basic support for message broker. If we use RabbitMQ or any other MQ broker we'd have many advantages over using redis here. However if we ever come to make this decision I'd suggest newer cloud native technologies like NATS.io or NSQ.io.
NATS.io - Is now CNCF hosted project which has promising future.
NSQ.io - Is more mature and trusted by industry biggies.