How do I find a developer to partner with?
Short answer
Go where they already congregate and demonstrate the thing they cannot do. Indie developer communities are full of people with working products and no traffic. A short, specific, unpaid piece of analysis about why their landing page is not converting is more persuasive than any pitch, because it proves the skill instead of describing it.
The longer version
This question comes up inside a longer piece on the same problem. If the short answer above raised more questions than it settled, the full article has the reasoning behind it.
Your Marketing Career Was Training For This