[17] Reid Hoffman, former executive vice president who later founded LinkedIn and was an early investor in Facebook, Aviary,[18] Friendster, Six Apart, Zynga, IronPort, Flickr, Digg, Grockit, Ping.fm, Nanosolar, Care.com, Knewton, Kongregate, Last.fm, Ning, and Technorati[3][19][20] Ken Howery, former PayPal CFO who became a partner at Founders Fund[21] Chad Hurley, former PayPal web designer who co-founded YouTube[8] Eric M. Jackson, who wrote the book The PayPal Wars and became chief executive officer of WND Books and co-founded CapLinked.[22] Jawed Karim, former PayPal engineer who co-founded YouTube.[15] Rod D. Martin, former special counsel to CEO Peter Thiel whose 10X Capital took over Galectin Therapeutics in 2009 and who founded Advanced Search Laboratories in 2012.[23] Dave McClure, a former PayPal marketing director, a super angel investor for start up companies[24] and founder of 500 Startups which has hit 500+ investments. [25] Andrew McCormack, co-founder of Valar Ventures [26][15] Luke Nosek, PayPal co-founder and former vice president of marketing and strategy, became a partner at Founders Fund with Peter Thiel and Ken Howery[27] Jason Portnoy, former vice president of financial planning and analysis who later became CFO at Peter Thiel's Clarium Capital, CFO at Palantir Technologies, and founding partner at Subtraction Capital. Keith Rabois, a former executive at PayPal who later worked at LinkedIn, Slide, Square, and currently Khosla Ventures, and personally invested in Tokbox, Xoom, Slide, LinkedIn, Geni, Room 9 Entertainment, YouTube, and Yelp.[15] Jack Selby, former vice president of corporate and international development at PayPal who co-founded Clarium Capital with Peter Thiel, later becoming managing director of Grandmaster Capital Management.[28] Premal Shah, former product manager at PayPal, became the founding president of Kiva.org.[4] Russel Simmons, former PayPal engineer who co-founded Yelp Inc.[15] Jeremy Stoppelman, former vice president of technology at PayPal who later co-founded Yelp, Inc.[3][5][7][29][30] Yishan Wong, a former engineering manager at PayPal, later worked at Facebook and became the CEO of Reddit.[31]