There were 4 rounds: 1. First round was DSA. The coding question involved using graphs and was not complex. 2. Second round was technical expertise interview. Here the interviewer will ask you about your experience and the things you have worked on. Be prepared to answer any questions related to your resume. 3. Third round was System design interview where I was asked to solve a problem. It's not very difficult and make sure to ask the interviewer the proper questions. 4. Cultural fit, this included behavioural questions like why skyscanner, handling conflicts etc.