it's been some time since I've been in the banking software world, but what aspects of the application are you looking to integrate with akka.net? ACH processing, interacting with different backends like Fiserv, check clearing, etc....?
one of the functionality that is used very often is posting transactions. In my implementation, i created a post transaction service which is a standalone from the corebankikng itself. Its main function is just to post transaction. So how how can akka be useful here?