Stripe Software Engineer interview questions

The position was in Dublin, but I interviewed with someone on the West Coast, which was where I was located at the time. The tech question round was multi-leveled as in build X, then add Y, then adapt for Z. Essentially, based on whatever "system", add these functions and change them to handle the input/output/question of the system. The interviewer was nice and better than 1-2 other companies I'd interviewed with in regards to responsiveness, communication, friendliness, etc.