This is a huge security issue according to Turkish law (called KVKK).
They should report this security breach here https://www.kvkk.gov.tr/veri-ihlali-bildirimi/ but I haven't seen anything reported from them.
I can recommend https://stackshare.io/dot-net-core as a good starting point.
As a .net developer, I always use .Net in the backend. I think it is very good in asynchronous programming.