The interview was not hard. The interviewers were 3 professionals, 1 recruiter, 1 service lead and 1 manager. It took 1 hour. The questions were generally about my skills and experience, there was some project and case related questions but there was no technical deep dive. Therefore it was a positive and comfortable interview and also because of my experience in the area. I expected to proceed to the second level; however I haven't heard from them since then. Of course they could have found more experienced or more suitable expert according to their financial benefit; however at least I would expect an email that my application process ended unsuccessfully.