Chai Atreya.Courtesy of Chai AtreyaChai Atreya's time at Amazon influenced his leadership at his next companies, including ActiveCampaign.Amazon's principles, like frugality, shaped Atreya's approach to decision-making and speed.While the technology has advanced, he still applies lessons learned from Bezos at his job today.This as-told-to essay is based on a conversation with Chai Atreya, a 44-year-old chief product and technology officer at Act…