A #datadriven dude, self-tracker, software developer, writer, and tech entrepreneur. Writes at www.markwk.com | Creator: @PhotoStats.io, PodcastTracker.com
CEO Foursquare, ex CEO Skyfire, ex CMO Travelocity, co-founder site59.com. http://t.co/Ypl79jP9u1
mapping tools for developers + precise location data to change the way we explore the world
News and updates from the staff at Medium.