The short answer
The right order
Founder-led sales should continue until the motion is repeatable: you know who to target, what triggers a good conversation and what message works. That knowledge, turned into a system, is what a first hire steps into. Hiring before the motion is defined outsources the hardest, least delegable part of the job to the least contextual person in the building.
Senior versus junior, honestly
Startup lore says hire young and coachable because senior sellers will not fit the culture. In practice the experience, connections and drive a senior seller brings outweigh the fit worry, and they need far less scaffolding. The catch is that seniors expect a system to sell within. Build that system and a senior hire is the highest-leverage early sales decision you can make.
What to build before the hire
The minimum is a signal-based target list, a sending foundation that reaches inboxes, and a documented sequence that has produced replies. With that in place, the hire spends week one selling, not configuring tools. Without it, week one is spent discovering that the tools do not work yet.
Questions people also ask
Should a startup hire an SDR or an AE first?
The bigger question is whether the outbound system exists yet. Build the repeatable motion first, then hire into it.
When should a SaaS founder stop doing sales themselves?
Founder-led sales should run until the motion is repeatable and documented. Systematise, then delegate.
Junior or senior first sales hire?
A senior seller with a network in a working system produces immediately. Hiring cheap and coachable assumes someone else built the system.