Had a basic leet style csv handling coding excercise which unlocks stage by stage. Idea was to extract data from csv into the right data structures and process them as per requirements.
I applied through other source. The process took 1 week. I interviewed at Helsing (Berlin) in Feb 2026
Interview
- Leetcode style interview
- sehr ruhiger und professioneller Interview Partner
- Es gab 9 Teilaufgaben, aber ich glaube das kaum jemand alle 9 schaffen wird
- Am Anfang muss man ein CSV file importieren
- Man sollte sich SEHR GENAU die daten anschauen, die man vor sich hat und sich dann für eine Datenstruktur entscheiden, in der man die Daten abspeichert.
Interview questions [1]
Question 1
Die gleiche Frage, wie hier schon mehrfach erwähnt: Eine Material liste importieren und dann bestimmte Metriken berechnen
Got 24(!) Pages of PDF as prep.
Stage 2 - Leetcode. Was pleasant and OK, the interview is designed that always a next task/challenge part comes after the one you solved.
Depite claiming in their PDF that they will come back within 1 week with feedback, I got ghosted like others among the reviews. bit of a lol
Ghosted.
Interview questions [1]
Question 1
Leetcode - was this topological sorting of aircraft/drone parts that others mentioned. Was not hard, there was also a next question/task after the current one finished