Really responsive and efficient HR team, with a clear four stage interview process. The first stage is an HR screening call. The second is a coding interview focused on basic programming skills. The third is a data science interview where you build and implement a machine learning model while explaining your approach. The final stage is a culture interview. Overall, the technical interviews are not especially difficult. I would recommend reviewing the fundamentals and practising training a few machine learning models from start to finish while explaining each step of your reasoning out loud.