On the one hand, having two founders who are brilliantly technical means there are tremendous opportunities to learn and grow. Both Rob and Jason actively and regularly push and review code. However, they both much prefer doing to teaching/leading, so less experienced engineers often find themselves floundering. I'd also be remiss if I didn't mention that one of the founders has a rather contentious approach that not everyone enjoys. If you work in a similar part of the codebase as him, you'll have to prove to him you know what you're doing before he trusts you. In the absence of that trust, expect extensive PR reviews. Feedback loop is nonexistent - both IC and managers often have no idea how they're doing until it's too late. Iteration speed is often high, with it occasionally impacting work / life balance. Leadership is a bit of a stickler about coming into the office.