Hey all,
I hope it is appropriate to post this here. We’ve recently released an open-source framework for developing serverless, stateful applications on top of Apache Flink (a stream processing framework).
Here’s the release announcement: https://flink.apache.org/news/2020/04/07/release-statefun-2.0.0.html
Feel free to ask me any questions you have about it here 
When Stateful Functions joined Apache Flink at the beginning of this year, the project had started as a library on top of Flink to build general-purpose event-driven applications. Users would implement functions that receive and send messages, and maintain state in persistent variables. Flink provided the runtime with efficient exactly-once state and messaging. Stateful Functions 1.0 was a FaaS-inspired mix between stream processing and actor 9Apps Showbox Tutuapp programmin