Every founder knows you gotta find market fit. Almost no one gets it right on the first try, which means iterating quickly and decisively is the difference between greatness and the void. On the Extra Crunch stage at TechCrunch Disrupt SF, we have a jam-packed panel filled with leading product builders to discuss just how founders should think about launching and iterating their products. First, we have Ravi Mehta, chief product officer at dating app Tinder .