It started with a short HR talk, then I went through an interview mainly focused on my background and past projects. It took more than three weeks to have the first technical interview.

The interview checked many projects that were relevant to their interests. The questions were very detailed, and it definitely required the applicant to have a very clear idea to talk about. Since I have several research-based projects listed on my resume, the questions were developed around my experiences. The process took about 50 minutes.

The interviewer expected more than I had prepared.

As I am not a native speaker, I feel some technical details were not explained as clearly as they should have been, even though I am quite familiar with what I did.

Preparing stories might help.