Below market pay for sw engineers, equity amount offered via RSO (options) isn’t substantial (and they don't tell people the value, and specifically will not answer this if asked even for a ball park, but once you join you can derive the value from outstanding shares and series a, and anticipated company value over time, it is worth about $20-100k over 4 years assuming best case, range covers about 95% of levels, will likely be illiquid for 10 years or more, and vests 10/20/30/40)
No bonuses for performance
Culture of not testing business critical software, no urgency on deadlines while at the same time the COO will ridicule a sr engineer, with 5+ years of service, during an all-hands company meeting for taking a vacation. While at the same time ignoring the advice of engineers doing the work to reach deadlines.
Code that works vs solves, lots of stubbornness on bad solutions/ideas, standard computer science knowledge isn't commonly known (eg standard data structures, algorithms), passiveness is rewarded, activeness is punished, spending effort on improving just adequate skills wasn't common, lots of "shooting yourself in the foot", too much acceptance of mediocrity
Not a great place for senior engineers who are passionate about writing software and honing their craft.
Some problems common of ceo/founders exist