The biggest challenge here is middle management. I understand that at such rapid growth at a relatively young tech company, we're bound to promote within - but this can be a huge huge problem if such an individual is not qualified to do so. Because we're filled with such talented and smart people, we tend to be a pretty competitive arena. And while that's something that can be motivating for people, it can also cause middle management and new managers to always strive to compete with the people they're managing. This isn't right and doesn't foster an environment where individuals can grow - manager and those under.
We need a better promotion and HR review cycles/processes. There are a lot of new managers being promoted that really shouldn't be - just because they excel at their job doesn't mean they're entitled to be a manager. A good manager should be one that not only excels, but can connect, motivate, and encourage their team members - and do that wholeheartedly. Some departments - like mine - are seeing managers push down those who have ideas, want more, or just want to know what's going on within the team for reasons that seem like they want to keep their status known.
I love Glassdoor and what we stand for, but seeing my growth stunted by my own supervisor is making me question if we're losing sight of our culture. We pride ourselves in providing a safe environment for workers to have ideas, to be heard, and to learn - but if we allow individuals to become managers who DON'T truly uphold this value ... then we aren't practicing what we preach.