Very technical compared to other companies.

I was surprised to not get any behavioral or job or CV questions - just coding. Not a bad thing, just a bit unusual.

The first round is a coding screening, then there are at least two rounds of technical interviews.

Round 0 (screening): Reformat some strings in JSON.

Round 1 (easy technical): Check if a string is a palindrome. Find a missing number in a sorted [1..n] array.

Round 2 (technical): C structure size and inheritance; detail on using base class/derived class pointers and deletion through those pointers. Implement the "tail" function, with references to fopen, fseek, etc., available.