Just quit properly and ethically. Tell the other founders/investors that you want out, and need to discuss a transition plan. Focus on the fact that you'll be o

Just quit properly and ethically. Tell the other founders/investors that you want out, and need to discuss a transition plan. Focus on the fact that you'll be out soon, and you want to minimize the disruption. That's the only ethical thing to do. Your resignation will be very disruptive, that's for sure. But there is some upside: the founders will get a lot of your shares back, so they can offer them to the next developer they need, and find a new "co-founder".