Brandon. He was a traditionally trained SWE (CS) but didn't have crazy FAANG names on his resume. Very humble, soft spoken guy. Could write code twice as fast as you, that was 2x easier to understand/grok, and would run 5x more effecciently than yours. Knew the stack all the way from the web layer to the CPU cache level. To this day I think about how he was thee definition of a "10x engineer".