Argyris is currently working in the Twitter Advertising team. Before that he cofounded AdGrok, an Internet advertising startup which was bought out by Twitter in 2011. He was born in Athens, moved to Cambridge University in 2004 for undergraduate studies and later received his MS and PhD degrees in Electrical Engineering from Stanford University. His graduate research focused on the development of optimization algorithms for various applications in science and engineering, like systems control, communication and machine learning applications. His current focus is on applications of machine learning on online advertisings.