If you want a good team make sure everyone gets along as a #1. Keeping around some insane genius nobody can work with is a net negative. People who are not humb

If you want a good team make sure everyone gets along as a #1. Keeping around some insane genius nobody can work with is a net negative. People who are not humble enough to say when they hit a limit (but know that there's always a solution) are a red flag depending. You need people mature enough to acknowledge that their code is the problem, not everyone else and their code. Soft skills is more important than developer skills in my eyes, but not the only requirement. For Juniors, its probably the highest, followed by an ability to learn and adapt to new technology.