Countersignalling. By deviating from the “professional” look so ostentatiously, they signal that they are so good that they don’t need to use the usual look.
For those who need a bit more context, YOLO the object recognition ML model. He can work anywhere he wants.
If he wanted to work on computer vision instead of a vegan restaurant (or something similar, I forget exactly).
And then there are people like me, who seem to believe that if their resume spacing is off by a nanometer, then the entire world will view them as an unemployable failure.