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I work in a small company but my team has currently grown to include well over a dozen people. We all report to the same boss.
This big team is broken up into sub-teams (each sub-team has no manager). One of the sub-teams is myself and this other new guy (I have been with the company for years, but he was hired only a few months ago).
It seems to me that new guy is under-performing. He takes weeks to complete certain projects which I can do in days or hours. I don't know if this is because he is not as experienced as me or because he is lazy/slacking or both.
Our boss is always super busy, so I am not sure if he is even aware of new guy's under performance or if he knows but accepts it (we were trying for a while to hire for his position).
How should I being the "senior" person on his sub-team handle this situation? I am not technically his manager so I find it hard to talk to him directly about the quality of his work, at the same time I don't want to go to my boss, because again it is not supposed to be my job to keep tabs on him.
Yet I feel a moral obligation to do something about what I believe is his sub-par performance.
How best should this be handled?
Also in this company, we don't do performance reviews so I don't know if anyone will ever come to know if I don't say anything.