Location: I came to the US from Switzerland to join Stripe. I came to Switzerland from Russia to join one of the best PhD programs in Computer Science. I came to Russia to join one of the best ex-USSR universities from Ukraine. In each of these relocations, I feel, I played geographical arbitrage: I was looking to escape the place where I was among the best to the place where I’d be average. In some of them, I think I wasn’t the prime candidate. By joining the people there and learning from them, I grew a lot. It’s hard for me to tell if US vs EU is a better location career-wise, but I can definitely tell from my experience that changing locations helped me grow a lot.