A headhunter from another company, working in part with Klarna, contacted me first. They convinced me to apply for the position.

First, I received a logical test to be completed on the computer within 15 minutes.

Then, I got a link to an online coding site with three questions. After solving them, I was invited for interviews.

Just the day before the interview, I was contacted by the headhunter who told me that, somehow, they had changed their mind. Mind you, up to that point, I had yet to see a human from Klarna, let alone talk to one. They are like robots and treat you like one.

Very unprofessional company and attitude. I just wasted my time on silly questions; do not bother. They did not even give a reason why they changed their mind. I had heard similar experiences about their unresponsiveness and ignorant attitude. It seems they were true.

Avoid this company like the plague if you value your career and sanity.

For the first logical test, you're given four shapes and must assume what the next shape would look like.

For the coding test, there are three questions:

1. You're given a number and should write the multiples of 3 and 5 up to that number. Using a set is straightforward.

2. You're given a string consisting of positive integers delimited by whitespace. You must get these integers and weight sort them. Sort first according to the sum of digits in each integer; if the sums are equal, the smaller one comes first. Use Java 8 Comparator.comparing.

3. A typical BraceChecker question: See if left parentheses match right parentheses. Use a stack!