Passionate about technology

Programs as a hobby

Will talk your ear off on a technical subject if encouraged

Significant and often numerous personal side-projects over the years

Learns new technologies on his/her own

Opinionated about which technologies are better for various usages

Very uncomfortable about the idea of working with a technology he doesn’t believe to be “right”

Clearly smart, can have great conversations on a variety of topics

Started programming long before university/work

Has some hidden “icebergs”, large personal projects under the CV radar

Knowledge of a large variety of unrelated technologies may not be on CV

via How to recognise a good programmer.