not at Reddit, but i've placed several people there over the past two years and i've heard enough debrief feedback to say something useful.
Reddit's behavioral rounds are not just STAR-method checkbox stuff. they're evaluating fit with their actual operating culture, which is smaller-team, more autonomous, less process-heavy than Google or Meta. so 'i drove alignment across 8 stakeholder groups' is not going to land the way it would at a larger company.
questions i've heard reported back: tell me about a time you made a technical decision with incomplete information how do you handle disagreement with your manager or lead on a technical direction tell me about something you built that didn't work out. what did you learn. describe a situation where you had to prioritize. what fell off the list and why. what's the most user-facing impact you've had in the last year?
that last one trips people up. Reddit is a consumer product. they want to hear that you think about what users actually experience, not just about code quality or internal metrics.
debrief-wise: the thing that kills candidates most often is vague answers. if you say 'we improved the system' and can't say by how much, they write 'lacks specificity' in the notes. go into every behavioral question knowing your numbers and your scope.
also: the values stuff is real there. they will ask why Reddit specifically. 'i use the product' is table stakes. go one level deeper. what communities have you been in, what do you think about how they moderate content, what would you build differently. that question is really a disguised culture-fit check.