I was interviewing for a contract position through a recruiting company. The interview process was very quick, less than three weeks turn around with three interviews in total. I would say I was expecting it to be more difficult, but maybe since it was a contract position it wasn't as extensive as expected.
Pretty good and smooth interview process. Almost all the typical questions as for any other technical interview. No need to prepare to something extra specific. One important note: be ready to showcase some of your previous projects or open source contributions
The people I talked to were friendly but left me with a negative feeling. The entire process was dragged out, I had to follow up multiple times to see what was going on.