I have a friend, who was involved in a startup part time, and he got shares in it.
Now he was offered to join the startup as a technical director ( the rest of the founders are sales and marketing) full time. His partners would like to offer him fix salary, in addition to the shares he already has. But he would like his salary to be tied to the company performance. In this way if the company is doing badly, he would receive a lesser pay than his current salary, but if the company is doing well, then he would also do better, much much better.
He doesn't know how to put this to his partners, mainly because we have never seen such a precedence for software developers to tie their income to revenue company generated. Also, the fact that he already has a share in the company complicates the matter because his other partners would use it to say that his income is already somehow tied to the company performance.
Are there any existing plans/ examples out there that connect a technical director's pay to company performance?