Kristen co-founded Irrational Labs, a behavioral product design company, with Dan Ariely in 2013. Irrational Labs helps companies and nonprofits understand and leverage behavioral economics to increase the health, wealth and happiness of their users. She also co-founded Common Cents Lab, a Duke University initiative dedicated to improving the financial wellbeing for low to middle Americans.

She was on the founding team for the behavioral economics group at Google, a group that touches over 26 teams across Google, and hosts ones of the top behavioral change conferences globally, StartupOnomics. Before designing, testing and scaling products that use behavioral economics, Kristen was a Sr. Product Manager at Intuit and camera startup, Lytro.