• Date of birth: November 1978 (Celle, Lower Saxony, Germany)
• Country of citizenship: Germany

• May 2004 – August 2007: PhD in Computer Science, University of Waterloo, Canada
     Thesis: Multi-User File System Search
• October 1999 – February 2004: Diplom Informatik (Master of Computer Science), University of Erlangen, Germany
     Thesis: Power-Aware Computing — A Kernel-Directed Compiler-Assisted Dynamic Voltage Scaling Algorithm
• June 1998: Abitur (High School diploma), Gymnasium Ernestinum, Celle, Germany

• September 2011 – present: Tech lead / manager (site reliability), Google Inc., USA
• March 2009 – August 2011: Site reliability engineer, Google Inc., USA
• October 2007 – February 2009: Software engineer (search quality), Google Inc., USA
• September 2006 – December 2006: Sessional lecturer, University of Waterloo, Canada
• May 2006 – August 2006: Engineering intern, Google Inc., USA
• May 2004 – April 2006: Teaching assistant / Sessional lecturer, University of Waterloo, Canada
• October 2001 – Februar 2004: Teaching assistant, University of Erlangen, Germany
• 1998 – 2001: Software developer (self-employed)
• September 1998 – June 1999: Basic military service, German Air Force

I have taught and TAed various courses both during my undergrad program in Erlangen and as part of my PhD program in Waterloo. [detailed list]
I have served as a reviewer for the following journals and conferences: ACM TOIS (2008), CIKM (2008–2009), ECIR (2007–2009), SIGIR (2006–2010), WSDM (2009), WWW (2010).

• "Outstanding Achievement in Graduate Studies", University of Waterloo (October 2007).
• Award for "Exceptional Teaching by a Student", University of Waterloo (April 2007).
• David R. Cheriton Scholarship, University of Waterloo (January 2007 – August 2007).
• Best student paper at the 28th European Conference on Information Retrieval (ECIR 2006): A Hybrid Approach to Index Maintenance in Dynamic Text Retrieval Systems.
• Konrad Adenauer Scholarship, Konrad Adenauer Foundation (2000 – 2004).
• 24th place (out of 50 teams) at the 2003 South-Western European Regional Contest (SWERC) of the ACM International Collegiate Programming Contest (as coach).
• 2nd place (out of 53 teams) at the 2002 South-Western European Regional Contest (SWERC) of the ACM International Collegiate Programming Contest; participation at the World Finals 2003 (as team member).

• Stefan Büttcher, Charles L. A. Clarke, and Gordon V. Cormack. Information Retrieval: Implementing and Evaluating Search Engines. MIT Press, 2010. (to appear)
• Gordon V. Cormack, Stefan Büttcher, and Charles L. A. Clarke. Reciprocal Rank Fusion Outperforms Condorcet and Individual Rank Learning Methods. Short paper in Proceedings of the 32nd ACM Conference on Research and Development in Information Retrieval (SIGIR 2009). Boston, July 2009.  –  Acceptance rate: 86/256 (33.6%)
• Charles L. A. Clarke, Maheedhar Kolla, Gordon V. Cormack, Olga Vechtomova, Azin Ashkan, Stefan Büttcher, and Ian MacKinnon. Novelty and Diversity in Information Retrieval Evaluation. In Proceedings of the 31st ACM Conference on Research and Development in Information Retrieval (SIGIR 2008). Singapore, July 2008.
• Stefan Büttcher and Charles L. A. Clarke. Hybrid Index Maintenance for Contiguous Inverted Lists. Information Retrieval 11(3):175-207, June 2008.

• September 2004 – April 2007: Executive of the University of Waterloo Outdoors Club.
• May 2001 – January 2004: Student member of the advisory committee for Computer Science (Studienkommission Informatik) at the Faculty of Engineering, University of Erlangen.
• May 2001 – May 2003: Treasurer of the RCDS Erlangen e.V..
• October 2000 – February 2004: Student representative (Fachschaftsrat) at the Faculty of Engineering, University of Erlangen.