Hire somebody as a senior engineer at market rate, and if you're happy with their leadership, you can convert them to a senior position and/or upgrade them to a

Hire somebody as a senior engineer at market rate, and if you're happy with their leadership, you can convert them to a senior position and/or upgrade them to a cofounder. But you'll want to see if they can architect your tech stack and build and lead a team first before you marry them.