If an individual is capable to run a business by themself, then there is no need to bring in a partner because partners can actually complicate business and make a business not to survive in a long term.
If you work in tech, it is almost natural that you will have a business partner. Their term is a co-founder. So while you may be the CEO, your co-founder will be the CTO. You hold the CEO AND CTO position at once. Even when you want to raise funds for your business, you are going to be asked about this. This is what I have learned about the tech field and anyone who have observed this will know that they are mostly two.