I am responsible for the consumer side of Groupon's operating system for local commerce.

I founded Ditto, a mobile local recommendations application that was acquired by Groupon.

Prior to Ditto I cofounded microblogging service Jaiku, which grew into the market leader in Europe and was acquired by Google.

At Google I worked on mobile applications and starting up Google's social efforts.

I am a sociologist by training, and maintain a personal web site at zengestrom.com.

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