Recently, our team hired an arrogant trainee-junior to the team, who turned out to be mean towards the other developers and in a habit of publicly mocking their opinions and going as far as cursing at them. He steals credit and insults others. He openly admits he's an offensive person and not a team player. When someone from the team speaks, he might break into laughter and say demeaning sentences like "that's so irrelevant oh my god did you really say that? hahaha". Our team consists of polite and introverted engineers who cannot stand up to bullies. Normally this kind of behavior won't be suitable even if you work in a burger shop especially not from a trainee. Let alone trainee, the rude behavior of Linus Torvalds was not tolerated, despite him being in the top position and a recognized star talent in the IT field.

I personally no longer feel comfortable speaking up during teams meetings or in the slack team chat. I'm afraid my opinions will be ridiculed or ashamed - likely will be called "irrelevant". I respond only if I'm directly addressed. We have important features coming up, requested by the customer, but I feel discouraged to publicly ask questions - I sort of feel having to regress into contributing less for the product. I also witness that other younger developers speak less now in meetings and team chat. Feels like everyone is hiding under the bed. Our product team used to have friendly working atmosphere but now the atmosphere is a bit like we're not a team anymore but a knot.

Lesson I learnt from here is: There is a reason why some companies have personality tests and HR interviews. Our proud short boarding process was consisting of a single technical interview. Perhaps at least a team interview should be held before hiring a person to the team, or the new hire should at least be posed a question: are you a team player? Technical skills can be taught more easily than social skills. If some youngster is unable to communicate in a civilized manner for even five minutes, it should raise some red flags. Otherwise you will end up with people who got refused from other companies which knew better.