Summary:

Now that Siri is baked into an iPhone, Dag Kittlaus seems to have decided that his work at Apple (NSDQ: AAPL) was complete. The co-founder o…

iPhone 4S Siri
photo: Apple

Now that Siri is baked into an iPhone, Dag Kittlaus seems to have decided that his work at Apple (NSDQ: AAPL) was complete. The co-founder of Siri left Apple at some point over the last few weeks after the launch of the iPhone 4S featuring Siri, a voice-recognition search and personal assistant.

Kittlaus joined Apple in 2010 when Apple bought his company, which was basically providing the same service as Siri on the iPhone 4S, just in an iPhone application. But AllThingsD reported Monday that Kittlaus has decided to move on, in what was termed an “amicable” departure.

It’s kind of an old story for the serial entrepreneurs of the world: develop something cool, get bought, leave after a few years. According to his LinkedIn profile, Kittlaus is working on two projects: a consultancy called Palindrome Advisors, which is helping nonprofits use mobile and social technologies more effectively to get out their message, and the Cabrini Green Tutoring Program in his home in Chicago.

Several prominent Siri executives remain behind at Apple to oversee future development of the feature, which Apple is putting front and center in its marketing for the new iPhone.

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