I only managed to get to the first technical screen. Overall, the interview process is:

• Application
• OA
• Tech Screen
• Technical Interview
• Behavioral Interview

It's important to note that Stripe cares about being able to produce working code fast. Time complexity or performance is only an afterthought.

During my interview, I was asked a string processing question. It was something along the lines of:

1. You are given strings representing transactions. Process the data so that it can be read more easily.
2. Now, aside from transactions, we can have rules which bar certain transactions from happening. Return the final state after the rules get applied at certain times.

Note: I made the crucial mistake of going for the optimal solution, which is O(n log n) due to sorting based on when the transactions came in. A much easier solution would've been O(n^2). Sadly, in the heat of the moment, I forgot to go for the obvious.