Finished all the rounds to last stage, then recruiter said everyone's excited to have me on board but there'll be a short delay due to internal deliberations, and that was the last I heard of them for a month now. Didn't bother following up since I found something else.

At first I recieved test task to do render 3D model using their old SDK Mapbox from their github repository. It wasn't too difficult and even interesting. Then I passed 2 interviews, one in C++ and another in Rendering. Then I was refused.