A cool way of introducing some additional proofing of your system is to do what big-science researchers do. Have two teams develop the same services, preferably

A cool way of introducing some additional proofing of your system is to do what big-science researchers do. Have two teams develop the same services, preferably in different languages. Then have a middleware in front of your database that requires for every action the request be sent from both services, and that the request be identical. As a side benefit your service would be quicker to reveal bugs in production as well.