Andrew Bialecki is a cofounder of Klaviyo and has served as the Chief Executive Officer and as a member of the board of directors since September 2012. Prior to founding Klaviyo, Mr. Bialecki served as Chief Technology Officer of RockTech, a sales and marketing software company, from April 2011 to June 2012; Senior Engineer at Performable, a marketing software company, from July 2010 to March 2011; and Lead Engineer at Applied Predictive Technologies, a business analytics software company, from September 2007 to June 2010. Mr. Bialecki holds a Bachelor of Arts degree in Physics, Astronomy and Astrophysics from Harvard University.