I worked with an intern for 6 months. He was great. Did everything I asked of him and has code still running in production. He went back to school and then app

I worked with an intern for 6 months. He was great. Did everything I asked of him and has code still running in production. He went back to school and then applied for a full time position, so I referred him with a glowing recommendation. He was rejected because he was quiet and not a good cultural fit. And that's why I avoid giving recommendations for friends. It's not worth the risk of rejection.