OA was combination of leetcode, python and sql. classic ML style technical rounds followed by culture fit interview. Hinge seems very particular about picking overall, fun interview questions and interviewers seemed super sharp and got good vibes. thought it was cool that they had staff level engs interviewing which helped when asking questions i had about company. hiring manager call is early on which is also super helpful to get a sense right away of whether you / they would want to work with each other.