That should enable people here to share what titles have fulfilled those responsibilities in their orgs.
Edited to add: I will mention that many early/small startups expect their CTO to take responsibility for most significant technical direction and architecture, and lesser but still non-trivial architectural responsibility gets handed down to daily grind developers. It can take some growth before there's room for an intermediate role that focuses specifically on architecture.
If a startup needs those skills, it's not really a startup anymore.
In any case, I’ve seen that role as Sales Engineer at enterprise startups in the 50-100 employee range, but haven’t focused enough on that space to offer more specifics.
If nobody else replies constructively here, I’d start by looking for the appropriately sized enterprise startups on Crunchbase or LinkedIn and see what you can notice about their titles and org structure.
https://angel.co/jobs should pull up some too