Jeff joined Google in 1999 and is currently a Google Senior Fellow. He currently works in Google’s Research division, where he co-founded and leads the Google Brain team, Google’s deep learning research team in Mountain View. He has co-desiged/implemented multiple generations of Google’s crawling, indexing, and query serving systems, and major pieces of Google’s initial advertising and AdSense for Content systems. He is also a co-designer and co-implementor of Google’s distributed computing infrastructure, including the MapReduce, BigTable, Spanner, DistBelief and TensorFlow systems, protocol buffers, LevelDB, and a variety of internal and external libraries and developer tools. He received a Ph.D. in Computer Science from the University of Washington in 1996, working with Craig Chambers on compiler techniques for object-oriented languages. He is a Fellow of the ACM, a Fellow of the AAAS, a member of the U.S. National Academy of Engineering, and a recipient of the Mark Weiser Award and the ACM-Infosys Foundation Award in the Computing Sciences.