Comment by smurph

Joel said it best: Smart and gets things done. That's really all you need. They don't need to be rock stars or 10xers or top 1%. You just need to be able to give them something to do and have confidence that it will get done in a timely manner and the code won't end up on Daily WTF. They need to have enough passion to bring some new knowledge to the table once in a while without you explicitly telling them to go learn about X. They need to get along with their teams. I think if you just push hard for those simple things, you will end up with some top tier developers anyway.