At a startup phase, I'm not sure there is anything that is strictly speaking a "CTO" task, except the paperwork. And once you get big enough for it to matter, t

At a startup phase, I'm not sure there is anything that is strictly speaking a "CTO" task, except the paperwork. And once you get big enough for it to matter, the same rule applies as for a CEO: the CxO you need for your first million is a different one you need for your 100 million and different yet again for your first billion. There is of course a GitHub list for this: https://github.com/kuchin/awesome-cto https://github.com/kuchin/awesome-cto and perhaps the best way to find out what you need is to check things off of that list that don't actually have anything to do with what you're actually working on. Role names generally have very little meaning on their own, it's all about context.