Pros
Company is doing well. Mostly a good collection of people. Chance for a nice payout if/when it makes an exit. Great experience and a lot more responsibility than you would have at a more established company. Portuguese treats every now and then.
Cons
Hectic/crazy culture typical of startups. People are constantly stressed and/or overworked, which creates a pretty nasty atmosphere. Low salary, especially considering location. At any other company, my workload would have been split between about three people, and each person would have earned several thousand more than I did at SR. They will pay you as little as they can get away with. The CEO puts a very low price on talent, making it clear how little he values people. Very little guidance/support. 360 approach to PDRs where everybody rates each other leads to some pretty intense office politics and social anxiety. Office doesn't hold everyone, though they are apparently moving soon. Everything goes through comity. Highly inefficient. CEO doesn't trust anyone to make decisions for him. Everything has to go through him. Office culture of working overtime 'for the good of the company' with no compensation means that people who leave on time are made to feel bad. Most people work late into the night and over weekends. Terrible work/life balance.