Which alternatives worked for you?
https://github.com/Bogdanp/dramatiq
Stay away from Celery if you can, or stick to v3.2 because 4.x has a ton of bugs.
It's just a fairly higher amount of boilerplate and setup compared to most of the alternatives either way.
Haven't had the opportunity to work with them, but I've heard good things about SQS and other cloud queues, but I think those are fundamentally message queues, so you'd be responsible for writing a job queue layer over it, which can be a huge hassle.