The interviewer was really friendly. The first step was to interview with HR, nothing special. The next step is a brief tech interview. The questions were average difficult. About async, I/O and so on. After that, they sent me a home coding task with a week's deadline. If you are familiar with the required technologies, there's nothing difficult. After submitting the coding take there will be one more tech interview, discussing your solution. Later, if everything is OK (well, actually, I don't know) they will send you a job offer. In my case, HR ignored my messages.