Pros
Loads of autonomy albeit ample amounts of ambiguity to go with it hand in hand but that's what you expect from a young, fast growing company. You're either made for start ups/young companies or ones that are well established that just need maintaining.
Diverse culture
Opportunity to be part of carving the way forwards for the company at a young age and integrating with our parent company.
Generous compensation package, opportunities arise frequently and plenty of scope to make a job what you want it to be.
Exposure to challenges you might not necessarily get in an established organisation
Plenty of annual get togethers to have fun
Loads of really interesting people to work with albeit some of the techs can be really high maintenance.
Cons
Definitely not a company for people that want a steady pace or find it difficult to roll with the punches/changes in direction, though this is not negative, just your preference.
Structures change quite frequently but again this is part of a rapid growth process, its expected.
Some things change really quickly, others that seem simple can sometimes take a long time but they do eventually happen.