Argyris Zymnis is the creator of AdGrok, an online advertising start-up, recently bought by Twitter, and a specialist in data analysis. Born in Athens, Argyris began his academic studies at Cambridge University in 2004 and later received a master’s degree (MS) and a Ph.D. in Electrical Engineering from Stanford University. His research focuses on developing optimization algorithms for various applications in science and engineering. He began his professional career in Adchemy as a research engineer prior to founding AdGrok in 2010. As of 2011, he works for Twitter as a software engineer.