Pros
I'm writing a review although I'm not sure if this company is going to still be in business in the future. During Q1 in 2018, most of the employees were fired or forced to sign contracts with Comarch (from more than 100 only 20 were kept at SoInteractive). The company was quite small (100 - 150 employees) and had a great atmosphere. It was a great place to start your career (first job ever) or even to move from one position to another. Not many, but if you were lucky it was possible to work on an interesting project.
Cons
There was a complete lack of management. The top management didn't have a vision, didn't organize the company, didn't get involved. A couple of pupils were treated better than others (could work remotely, could visit the CEO in NYC, could go to conferences etc.). There was no training plan and no career planning. The company employed mostly students and juniors hence there was not many specialists or seniors (especially when it comes to programming). There's been an ongoing problem with disinformation (about what's happening in the company, what's the direction, current issues etc.). They offered low salaries compared to what's on the market. There were no real gamification projects.