From what I understand, many engineering companies will hire through third party recruiters. The listings that I have read so far seem to intentionally obfuscate key information: which company is hiring, and who the hiring manager is. I managed to complete a phone interview with the company going through the recruiter which gave me insight into which company was hiring, and who the hiring manager was. I contacted the recruiter for the hiring manager's email address so that I could send them a followup email, but the recruiter said that they would handle it on my behalf.
Frustrated with the lack of response, I did some digging and found the hiring manager on LinkedIn! This would give me a potential avenue of contact, but I wonder if this would come off as violating any boundaries. Or, perhaps just as bad, maybe I would become a conflict of interest and would then be unable to be hired.
Is reaching out to the hiring manager over LinkedIn a good idea in this situation?