by Pearl Leff I once worked at a small company of insanely productive engineers. They were geniuses by any account. They knew the software stack from top to bottom, from hardware to operating systems to Javascript, and could pull together in days what would take teams at other companies months to years. Between them they were more productive than any division I've ever been in, including FAANG tech companies. In fact, they had written the top-of-the-line specialized compiler in their industry — as a side project. (Their customers believed that they had buildings of engineers laboring on their product, while in reality…