“Imagine you are nothing like how you are right now,” says Duretti Hirpa, a senior engineer at Slack. The words tumble out of her mouth as she tries to convey the alienation and otherness of working in Silicon Valley when you don’t fit the conventional image of an engineer. “It’s very tough to explain to someone what you experience, if it’s not their lived experience,” she says. Between 2006 and 2011, women represented just 12 percent of the engineering workforce in the United States, according to data collected by the American Association of University Women. In the same time period, women of color accounted for just over 4 percent of the engineering talent.