How should you treat proud developers with no real experience?

What do you mean by proud developer?

@aitkotw Devs which think they know more than the others, but in reality is the opposite.

Show them snippets of their code, explain why it is wrong and how they can correct it. If they can't understand what the problem is, even when you give them logical explanations and solid proof, they have no business being programmers.

Ignore them 🙄

And if being reasonable and honest fails, make sure their code and design decisions can be traced back to them when the inevitable happens, maybe after the hubris they'll be more receptive 🤐

@AlexDeLarge @ThatDude
I've been working with that kind of developers. They don't listen to you because they think they are the best, which leads to bad design and code! So I think the better way to deal with them is to ignore them and try to fix their mistakes till they discover that they were wrong.

Trial by fire.

Put them through very stringent training and give them no illusions about their code quality. Help them improve, applaud them for good code, and chastise them for mistakes. But always be honest and fair.

Either they will improve significantly and learn that they don't know everything, or they'll get butthurt and refuse to improve. Either way, it's on them.

Give them a project they cannot possibly complete. When they ask for help, laugh. "Aw, shucks. Now's not the time for modesty!" Attitude will change right quick when they fail at something.

Pair him/her with a manager who thinks they know everything. Then get pop corn .