In terms of new hires, yes, they should absolutely be trained. Getting hired at a new company, I am always lost. There's so many things that you don't know abou

In terms of new hires, yes, they should absolutely be trained. Getting hired at a new company, I am always lost. There's so many things that you don't know about the existing code base. Thus, the solution of FB's two week boot-camp to get employees up to speed is IMO what every company should do. But for start-ups my experience has been that everyone is learning and teaching one another and developing simultaneously. The whole process of being in a start-up is itself training.