The interview process went very smoothly through a couple of levels.

A talk with Klarna's HR proposed a better position than the one I applied for—better suited for my current career plan, anyway.

A very interesting pattern-matching IQ screening followed.

Then, we moved on to a 1-to-1 meeting with one of the managers.

This was followed by the first phase of the technical interview, where things started getting odd. The tech questions and even the live coding challenge went smoothly, but I did get a very weird question for a tech interview, that I probably flunked completely.

After that, I never heard from Klarna for 8 days.

Describe how onboarding a new employee would look.

Solve the Partition Problem (split a list of positive integers into two lists so that the sum of the numbers in each list is equal).