I'm pretty agnostic on cold emails as a strategy, but this article doesn't mention the specific sourcing method used here which I found a bit distasteful (but common) — scraping the HN "Who's hiring" thread:

  Hey Dylan!

  I'm Luke Hager with Molecule.dev, and I'm emailing you because I saw your post on HN. I've been looking around for companies like CALA who might be able to make good use of Molecule.dev. I see that you're using TypeScript, React, PostgreSQL, Node and other modern web/mobile tech.

At the very least this goes against the guidance in the monthly thread ("Readers: please only email if you are personally interested in the job")