That tech, one of the highest-paid sectors, is unrepresentative of the country at large poses a crisis not only of wealth and income inequality, staggering as that may be. It also means the people developing technology don’t look like the people who use it. Powerful algorithms, for example, help determine who gets a job, a home loan, access to health care — or even a speeding ticket. In other words, the systemic exclusion facing Silicon Valley aspirants has the potential to affect every Black and Brown person in America. “The people whose hands are making those products that so increasingly govern our lives, our personal lives, our professional lives, the lives of citizens, are not actually made by diverse hands,” said Lisa Lewin, chief executive officer of General Assembly, a large provider of coding bootcamps. “That, to me, is hugely problematic.”