I have been contacted through an agency and then I spoke with an HR from Roku, she said that she will let me know whether they will move forward or not after discussing with hiring manager next week. Since then there was no response over a month or more. Suddenly, over a month passed and I got an email from another HR to select the interview slot with hiring manager. I was on emergency leave at that time and I have responded them that I'll be available for interview after a week after returning from leave. They acknowledged on it. Post returning from leave I found the slot selection link was expired and requested to resend another link and as usual no response and got a regret mail after 2-3 days.