Pros
None. If there are any positives, they are quickly overshadowed by the negatives.
Cons
All the other reviews here are spot on. Jo, the CEO, is the worst manager I have ever witnessed. She did some of the development on the product 10+ years ago and feels this qualifies her to be a technical architect today. It doesn't But, she will still micro manage you and your technical decisions and be quick to tell you how easy things are, how she can build it herself and it shouldn't take you so long. It's easy to build things quick when there is no documentation or tests of any kind. The only developers who have lasted at that company are there because they have learned to always say yes to Jo. Eventually she will get distracted and leave you alone for a few months. Just brace yourself for when the hot potato lands back on you. All the other competent developers who take a job at ShipperHQ start looking for a different job immediately, and leave first chance they get.