I had a 30 mins screening with a recruiter based in London, then an technical interview in Python with a Software Engineer based in the US. It was pandas focused. Mostly handling dataframes and standardizing columns. They want to see that you are comfortable with the library and handling data with code.

The whole process is great, hr team helps me a lot. 4 Rounds interviews with the tech lead and the org lead. Its hard to say that the company is doing really tech side jobs, but they 110% are trying to sovle real world problems.