But serving huge volumes of video is only one-half of the back-end engineering challenge for YouTube, which Google bought in 2006. The site must ingest huge quantities of video uploaded 24 hours a day around the world. That’s Doshi’s specialty—he is the tech lead for uploads. "Everything at YouTube is made immensely more complicated because of the scale at which we operate. We get 72 hours of video uploaded every minute. That’s like 36 full-length movies being uploaded to your site every minute."