Overall nice company, but there are some pitfalls
Pros
Flexible working hours and vacation policy, opportunities for education and attending conferences, nice perks box (but it's not the best one on the market). Every team uses pure Scrum and company is very agile now. They have annual performance review. Swift, VIPER, SOA, unit and UI testing. Smart co-workers and nice people overall. Good culture. Work hard and play hard.
Cons
Generally there are two departments. You can work in a feature team and then your duty will be to maintain some little feature or you can work in architecture team where you'll solve infrastructure tasks. Anyway it will become boring someday. A lot of legacy code and it won't be refactored forever it seems. Salary is not increasing, performance review doesn't work, so you can stuck with one salary above the market in years. They will hire someone from another company rather than promote current employees. Company has a unique and strange politics that you should be also a QA. Be ready to do manual testing and to write test case. It's like a trend here! Some people and teams may be very toxic. Your team leader can be unexperienced.
