Pros
Formulas are practiced in the company and taken literally. A very inclusive and diverse culture, my first weeks were people walking up to me to introduce themselves and always seem really happy to share their experiences and ideas. Lunches were sitting with and mingling with people across different teams and functions. Adyen has an extremely flat hierarchy so you will have to find and pave your own career here, but at the same time because of the flat hierarchy you'll find people here alot more approachable. There's never a "wrong" or "silly idea" and you are empowered to move your career the direction you want. The culture here allows you to start new projects and initiatives here more easily compared. Definitely a great place for people who enjoy taking ownership and self empowered here.
Cons
It's not a culture for everyone, be prepared to speak your mind (there is no wrong answers here)