I applied in-person. The process took 6 months. I interviewed at InterExchange (Quito) in Oct 2020
Interview
Will depend on international recruitment but is easy in general, the will test you both written and oral English exams. If you can't pass them they will give you another chance to prepare depending on your age limit for the program.
Interview questions [1]
Question 1
Tell me about yourself and why you would like to be an au pair?