I'm (technically speaking) working as a PHP and Common Lisp developer for my own startup. I'd love to do more Lisp, or in another universe, I'd love to work on

I'm (technically speaking) working as a PHP and Common Lisp developer for my own startup. I'd love to do more Lisp, or in another universe, I'd love to work on engines and wish that I knew more about their design, power, efficiency...