As business-development V.P. for Foursquare, Tristan Walker helped the…app become a major contender…forging partnerships with…brands like MTV, Bravo, CNN, and The New York Times. Earlier this year Walker left the company and is now “entrepreneur in residence” at…venture-capital firm Andreessen Horowitz. There, Walker is developing new businesses, while in his spare time working to build the nonprofit Code 2040, which helps provide opportunities in the tech industry to high-performing African-American and Latino students.
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