There were about 5 stages, starting with a HackerRank coding test, followed by a couple logic and reasoning tests, one architecture test and a final culture and values evaluation. The HackerRank test had 3 questions and included one algorithms question and one about basic programming language usage. The logic tests were straightforward and I passed through these 3 first stages in the course of 1 week. The final 2 interviews: - the architecture one was an open ended discussion about an ongoing product solution, where I discussed with one of the founders, Henning, trying to reach a sensible strategy - the culture interview was peculiar, I was not prepared for being asked some deep questions, which required some introspection, but I was quite pleased by the following discussion I had; this interview was also held by the other founder, Tomás