[7] In September 2006, during his junior year at Northwestern, he started a campaign to protest the launch of Facebook's News Feed feature.

He worked as a Community Assistant at Elder Hall and was elected president of InNUvation, Northwestern's entrepreneurship club, as an undergraduate.

Before his graduation in 2008, Parr joined his mentors Troy Henikoff and Mark Achler to launch Free Lunch, a Facebook application development company.

[16] In February 2012, Parr started a company, The Peep Project, the firm attempted to change the way people interact with information.

[17][18] In 2012, Parr started a seed-stage venture capital fund, DominateFund, with partners Matt Schlicht and Mazy Kazerooni.

[19][20] On February 4, 2014, Parr announced that he was in the process of writing his first book, Captivology: The Science of Capturing People's Attention, released by HarperCollins in March 2015.

His book includes interviews with Sheryl Sandberg, Steven Soderbergh, Jeff Weiner, Grant Imahara, Brian Stelter, David Copperfield, Daniel Pink, Shigeru Miyamoto, Alan Baddeley, Susan Cain, Michael Posner, Adrian Grenier and others.

The platform powers the bots used by celebrities, brands, small businesses, and publishers, including 50 Cent, Kiss, Aerosmith, and Lindsay Lohan.

[27] In 2017, Octane AI was named one of Gartner's Cool Vendors in Mobile App Development and was featured in The New York Times.

In March 2017, Parr was elected to the board of directors of Samasource, a non-profit business with the mission to reduce global poverty by connecting unemployed people in the United States and impoverished countries to digital work.

[38] In 2015, Parr was named one of the top 10 Internet of Things experts by Inc. Magazine alongside Tony Fadell, Chris Sacca and others.