First a skier, second a statistician &#43; machine learning engineer. Working on Something New ^(TM). Recently worked on {graph ML, recommender systems, abuse, causal inference, ...} <a href=&#34;https://cortex.twitter.com/en.html&#34;>@Twitter Cortex</a>. Before that, competitive intelligence <a href=&#34;https://www.uber.com/&#34;>@Uber</a> and self-driving <a href=&#34;https://www.uber.com/us/en/atg/research-and-development/perception-and-prediction/&#34;>@UberATG</a>. I also write