Uber Staff Software Engineer interview questions

Recrutador faz umas perguntas do tipo inverter arvore binária, não segui adiante para saber como seria a entrevista técnica, porém teria a etapa de engenharia, parece um processo longo, complexidade de ordenação em termos de o(n), fui abordada no linkedin

Never-ending interview process with 8 steps. The first interview was to design an API for scheduling meetings. There was some conversation about past experience, but it didn’t seem like they cared, they just expect you to implement a perfect solution in 45 minutes. Leetcode style