Hello Sir...
I am a computer science tutor, I know well (among others) Scala, Haskell, Akka, Prolog and Algorithms.
I have done a fair share of reactive programming in Scala and Javascript, and also took the "reactive programming" course on coursera.
I have done many projects like this, and I'm one of the top Scala developers, you can check here please: https://www.freelancer.com/freelancers/skills/Scala/
Please contact me for more details when possible.
I look forward to work for you, Sir.
Best Regards.