Open concept office for engineering team. No 401k matching. "Unlimited" PTO instead of a generous concrete amount of vacation time. You're expected to spend free time outside of work doing work. No QA. There are a lot of all-hands meetings where upper management spits out propaganda about how great the company is.
Overall, it's a very fast-paced high-stress environment, where an engineer is essentially expected to perform the job of an engineer, QA, DevOps, L3 support, and a product manager, and be as efficient as if you were just an engineer. You'll randomly get assigned responsibility for supporting other teams' code running in production without being given any time to actually understand it.