Klarna users are being signed in to random accounts

I am really really interested in knowing the root cause. I am really concerned by agile, and start-up hipster culture creeping into critical infrastructure companies.

There are so many patterns(event driven, CQRS) in recent microservices architecture, which are gaining popularity and people have been using them without realizing the cons and the need for them.

>agile, and start-up hipster culture

What does that even mean?

Looks like people are really offended by this. Agile lately has been looked at this silver bullet for software engineering. I have worked both in Cisco and some good startups and in my humble opinion having fast paced development and high feature churn rate really is unsuitable for a bank and other infrastructure companies.

Also by hipster, I mean that the banks don't have luxury to experiment with latest trends and the cool tools. They have to stick with the old proven methods.

I don't understand your perspective here.

Debates about Agile have gone on for ages, that's not a 'lately' thing.

I have no idea what 'hipster' has to do with banks and tools... or what you mean by 'old proven methods'.

Not looking for a debate myself :)

Making snarky comments about a common development methodology but not interested in debating the merits of the underlying complaint? I believe that’s called trolling.