A Go-to-Market Engineer is a growth operator with an engineer's discipline, and they are the thing you are actually buying here. We staff them the way we staff product teams: half-time or full-time on your business, sitting inside it rather than splitting attention across a dozen logos.
They own the traction plan end to end. Choosing which channels to test, building and running the experiments, wiring up the measurement so a result can be trusted, and coming back to you with what the numbers actually said. Each channel below has a page showing exactly what that looks like - the six steps, the ramp, and the share of a week it takes.
They are also the reason paid dollars can be traced to something real. A GTM Engineer works from the same product analytics your developers do, so a click can be followed past the form fill into signup, activation and payment - which is what turns a marketing number into a business one.
That last part is the whole difference. Your GTM Engineer reports the experiments that failed as plainly as the ones that worked, because a channel you've ruled out is worth nearly as much as a channel you've found. Both of them tell you where the next dollar should go.
It's also where a GTM Engineer stops looking like a marketer. Every number above is only as good as the instrumentation underneath it, so your engineer owns that layer too: