HR screen followed by a CoderPad test. The test was ridiculous. 50 minutes for 11 questions, some simple multiple choice, some complicated transformations of tabular data with very stringent time limits. Just barely enough time to read and understand the question and physically type the solution. It did not address data science or machine learning problems, just "can you rearrange this data before the timer runs out". Perfect recall of very specific Pandas operations was needed to get the solutions within the time limits. Pay for the level of experience they expected was about $50k below market rate. Ghosted after the test.

Several steps including recruiter, pre screen, code exercise, case study problem, behavioral rounds, hiring manager round. Overall, some rounds were harder than others and it really depends on your strengths.