Initial call went nice. I was then given a rather long take-home assignment - taking anywhere between 1 to 3 full working days. It was considering refusing it, but N26 sounds like an interesting company so went ahead and did it. I didn't make it to the next round, and was given no feedback. If a company wants you to spend 1+ days on a take-home assignment and doesn't even bother giving feedback, it shows how much they value your time.