I applied online. The process took three weeks.

The interview was easy, but the HR was totally ridiculous! Originally I applied for a development team lead. The HR told me that I should apply for a lead engineer role instead, then I did. I received a senior-level quiz about designing a flight board, which was followed by a tech interview with two lead engineers. I answered all the questions with ease, and that was nice and easy. A couple of days later, I received a call from HR saying that they were happy with my tech interview and would organise a team fit interview, which was going to be the final round for me. I told her I originally applied for a lead engineer role, but now it became a senior role without letting me know. The HR said she would let me know the next day morning. A couple of hours later, I received an email saying they felt that there was still enough room for me to develop and they would like to consider me as an intermediate engineer! I don't understand what's going on with this HR. This is totally ridiculous, disrespectful, and unacceptable. They seem to think lead engineers in other companies are just intermediate level. It was just a waste of time.

Design a flight board system.