Lukas Biewald 823 Capp St., San Francisco, CA 94110 (650) 804 5470 lukas@crowdflower.com Awards Netexplorateur of the Year http://www.netexplorateur.org/ (2010) TechCrunch 50 http://techcrunch50.com (2009) First Place, Caltech Turing Tournament http://turing.ssel.caltech.edu

Work Founder, CEO: CrowdFlower 2008 — Present • Built leading Labor-on-Demand company from the ground up. Designed and coded core technology. Built customer base up from nothing to 100 customers including several Fortune-500 companies. Hired 25 employees. • Raised two rounds of financing totalling $6.2 million in 2009 in tough economic climate from well-known angels and VCs including Trinity, Bessemer, Founders´ Fund, Auren Hoffman, Aydin Senkut, Manu Kumar, Gary Kremen and Travis Kalanick. Senior Scientist: 2007 — 2008 • As the 20th employee, created and led two core teams: metrics and search ranking. • Developed the Amazon Mechanical Turk interface, identified as a key technology in ’s $100 million acquisition. Relevance Engineer, Engineering Manager: Yahoo! Inc. 2005 — 2007 • Technical lead for research, development and deployment of new web search ranking functions in five major markets. • Chosen as most productive employee in Applied Science business unit year end review. Research Assistant: Stanford AI Lab (sail.stanford.edu) 2003 — 2004 • Researched word-sense disambiguation, machine translation and Japanese word segmentation. • Published two papers with over 100 citations.

Education 1998 — 2004 BS in Mathematical and Computational Science with Honors (2003) MS in with Concentration in Artificial Intelligence (2004)

Publications David Vickrey, Lukas Biewald, Marc Teyssier, and Daphne Koller Word-Sense Disambiguation for Machine Translation. Conference on Empirical Methods in Natural Language Processing (EMNLP), 2005.

Peter Bodik, Greg Friedman, Lukas Biewald, Helen Levine, George Candea, Kayur Patel, Gilman Tolle, Jon Hui, Armando Fox, Michael I. Jordan, David Patterson Combining Visualization and Statistical Analysis to Improve Operator Confidence and Efficiency for Failure Detection and Localization. International Conference on Autonomic Computing (ICAC), 2005.

Brendan O’Connor, Lukas Biewald Superficial Data Analysis: Exploring Millions of Social Stereotypes. In Toby Segaran, Jeff Hammerbacher (ed) Beautiful Data. O’Reilly Media, 2009.

Patents Bardige, Arthur H., Lukas Biewald Computerized System and Method for Visually Based Education. U.S #6,918,768. July, 2005

Franco Salvetti, Lorenzo Thione, Richard Crouch, David Ahn, Lukas Biewald, Brendan O’Connor, Barney Pell Browsing Knowledge on the Basis of Semantic Relationships. 12/201,978. Aug, 2008

Chad Walters, Nitay Joffe, Lukas Biewald, Andrew Alan James Browsing Knowledge on the Basis of Semantic Relationships. 12/201,051. Aug, 2008

Chad Walters, Lorenzo Thione, Barney Pell, Lukas Biewald, Brendan O’Connor Efficient Storage and Re- trieval of Posting Lists. 12/201,079. Aug, 2008

Hobbies Expert-level Go player (AGA 5-dan)