Riskified Backend Developer interview questions

Process start with HR call, than a Technical interview for an 1.5 hour. interviewer was nice and professional. spoke about old project. and asked few questions: Find what is bad in a code 2 sum setAll in O(1) second interview was conducted by team leader and another developer. both were nice. The first part was ok, spoking about a problem the company encounter, than i need to suggest a solution. the second part was little un clear, i should implement the solution but basing on elements which not described in my solution. so for summary functional requirements for implementation was not clear. day later i got a phone call from HR which update me i not passed and gave me a feedback on what was good/bad in the interview.

Short phone interview with the HR that took 15 min and a technical interview with senior backend developer from another team that took 1 hour and a half. After that, another technical interview with writing code simulation