1 aptitude test + 4 rounds of interviews with various people at the company, including the recruiter, hiring managers, director, and COO. Took about 2 months, from the application date to the final interview. Despite the hiring managers and recruiter emphasizing the company's culture, I was left hanging by the recruiter after completing all four rounds of interviews. For a month after the final interview, I kept receiving the same generic response that they were still assessing candidates, only to be ghosted in the end. Disappointing. The interviews with the hiring managers and COO were pleasant. They were all friendly and seemed genuinely interested in both you as a person and your technical background.