What did he work on before LuaJIT? Seems like he could have been involved in CPU design? He thinks more like a hardware guy than a C programmer.

I don't know that much about his background. I didn't get much of a chance to talk shop with him (which is too bad, I would have loved to pick his brain about all sorts of things). I also assume from the lack of info about him on the Internet that he's a somewhat private person, so I definitely wanted/want to respect that.

This won't do all that much to fill in any gaps in his CV, but here's something else he wrote: http://www.pagetable.com/?p=656