50% at least. I've worked at a few startups and all you need at the beginning is engineers. To be honest I probably wouldn't take the position at all unless you

50% at least. I've worked at a few startups and all you need at the beginning is engineers. To be honest I probably wouldn't take the position at all unless you already had funding. Would you start a restaurant without ever working in one? A bank with no finance knowledge? If you're not a tech cofounder become one. The reality is that a company with a handful of people needs to have every one of those working on their product or they will be at a massive disadvantage to anyone else that does.