I am a senior developer, working in a big tech company.
My team is a new team, got created recently.
We don't have a manager, because the manager left the company.
The manager of the department, asked me to take care of the team technically.
There is one dev who is making problems to me. Since the beginning, I have lots of concerns about the quality of his work, I am spending lots of time correcting his work and trying to guide him in technical solutions. I think he didn't take that very friendly, maybe he is not used to have those kind of feedbacks, maybe because I was a bit strict.
I tried to use different technique such as giving him hints rather than direct answers.
Now the situation has evolved, he is coming with technical solutions without aligning with the team. I have lots of concerns about those solutions. Some of them are really bad.
What can I do? The easiest way is to talk to the high manager but I am not sure that would solve the issue, maybe he will be even more defensive.