Ethan Rosenthal is the first Data Scientist hire at Dia&Co, a personal styling service for plus-size women. He builds data science products for enhancing the customer experience through increased personalization while optimizing over constraints inherent to a rapidly scaling startup. This work ranges from recommender systems to integer programming to natural language processing. Before Dia&Co, Ethan was a Data Scientist at Birchbox and an academic physicist. He received his PhD in Physics from Columbia University where he studied unconventional superconductors.