How to find committed full stack devs? (I will not promote)

Pretty much what the title says. I’m planning on building an app this summer and I think a technical co-founder who has full stack capability would help me a lot. I have about 70 percent proficiency with code and I’m reasonably experienced in most languages, but I was just wondering where I would start to find these kinds of people. Any advice is greatly appreciated as I’m still really early in this process