Funny enough, we were fortunate to meet Guillermo through our lead, GGV as part of due diligence. GGV had recently led Vercel's recent round so he was part of the process of vetting our product. Our timing was also great as we had recently shipped our Vercel integration [1] and were the only integration supporting background jobs and workflows in their integration marketplace. He quickly recognized the value in what we were building and was interested to invest. It was an ideal combination of timing of having built something of value to the Vercel ecosystem and being intro'd!
Guillermo has been a fantastic supporter overall :)