Barring a fair market salary I would argue an even split is appropriate. If this is a tech company, the other party doesn't need you for a series A, they need you to run the company... which at this inflection point is fundraising.
Just spitballing here:
In exchange I would be generous on the vesting side of the equation. I'd ask for half the company over 6 years where you get ~75% of your shares in the first 2 years of the relationship. The company will probably be dead by that time anyway (based on how these things go). If not, you've earned your keep.
You'd definitely be wise to consult an attorney about how to execute whatever deal you agree to do. They'd probably be able to give you better advice.
Just spitballing here: In exchange I would be generous on the vesting side of the equation. I'd ask for half the company over 6 years where you get ~75% of your shares in the first 2 years of the relationship. The company will probably be dead by that time anyway (based on how these things go). If not, you've earned your keep.
You'd definitely be wise to consult an attorney about how to execute whatever deal you agree to do. They'd probably be able to give you better advice.