I applied for senior software engineer at snke os through brainlab. A month later I got a coding challenge in hackerrank platform from a recruiter from snke OS. I completed the coding challenge with complete and perfect output.s and answers. After which I didn't get response for a long time. I reached out to the recruiter who provided me the coding challenge again multiple times. After multiple follow up, I received a rejection email. My suggestion to future candidates- if you get a coding challenge from brainlab or snke OS, don't waste your time taking up the coding challenge through hackerrank or similar platform. Because irrespective of how well you perform in coding challenge, you will get rejection email.