6 rounds:

• Recruiter talk
• Culture fit
• Hackerrank challenge
• Technical discussion
• Team lead interview
• Director interview

All rounds went well, with only positive feedback. Half an hour later, the Director decided I was not positive enough and kicked me out of the process. This is typical of a tech company that thinks the "American way" is the right way, giving you an extra kick afterward.

As usual, directness is praised only in thought, not in reality. My advice to future candidates is to keep smiling.

For the HackerRank challenge, just download the code (as in a Git project); the online editor is terrible.

Any question by the director, just answer in any way that strokes his ego.