We’ve always allowed engineers to interview using their own preferred environment (which can be fun or challenging for us interviewers!), but now we do enough interviews every week to see which tools tend to be more successful.

Also, there are some rising stars we couldn't include in this analysis, like Go: candidates writing Go during their interview with us did extraordinarily well on average, but we don't yet see enough of them to break them out of the "Other" language category.