You already have leads arriving. You already have a CRM. Somewhere between those two facts, revenue is leaking, and the people who could fix it are busy selling.
That gap is what a GTM engineer is for. This guide is written for the person doing the hiring, not for the person applying.
What the role is actually accountable for
A GTM engineer is accountable for the machine between a lead entering and a human closing. In practice that means five things:
- The data that decides. Whether the record a rep opens is correct, enriched and scored before anyone spends a dial on it.
- The routing. Which lead goes to which person, branch or queue, and what happens when nobody picks it up.
- The channels. Email sequences, AI calling, SMS where compliance allows it, and the follow up that keeps a lead alive.
- The write backs. Whatever the system learns has to land on the record a human reads, not in a log only the builder opens.
- The evidence. A path from money received back to the list it came from.
Notice what is not on that list: closing deals, managing a team, or owning the message. Those are different jobs. A GTM engineer who is asked to do all of them will do none of them well.
Write the role around one number
The most common hiring mistake is a job post that lists tools. Clay, n8n, HubSpot, Apollo, SQL. A tool list tells you what a person has touched. It tells you nothing about what they can be held to.
Replace the tool list with three lines:
- The number. Qualified meetings per month. Speed to first contact. Percentage of revenue traceable to a source. Pick one.
- The decision rights. Can they change a sequence without asking? Can they change routing? Can they pause a campaign that is burning budget? If the answer is no to all three, you are hiring a ticket taker and the number will not move.
- The evidence. What you will look at in ninety days, and where it lives.
If you cannot fill in those three lines, the role is not ready to hire. That is useful information: it usually means the process itself has not been written down yet, and automating an undocumented process only makes it confusing faster.
What to ask in the interview
Ask for work, not vocabulary. Four questions that separate people quickly:
"Walk me backwards from a deal you influenced to the list it came from." The strong answer describes stamps, fields and handoffs: the deal record, the handoff from the agent or rep, the call, the list, the source. The weak answer describes tools.
"Tell me about an automation of yours that failed silently." Everyone has one. The answer you want includes how they found out. People who say it never happened either have not shipped much or were not watching.
"What would you refuse to automate?" A good GTM engineer has a list: anything irreversible without a human check, anything where the process is still in debate, anything where the data is too dirty to trust. Someone who would automate everything will cost you a cleanup project.
"Show me something you built that someone else now runs." This is the one that predicts whether you are buying a system or a dependency.
Run a paid project before a contract
The gap between a good interview and a good hire is wide, and twelve month contracts are an expensive way to find out. A small paid project closes most of that gap:
- Pick a real problem with a visible result. Not a test. Something you actually want fixed.
- Give them read access to what they need and a single point of contact.
- Agree the deliverable in writing: what will exist at the end, and how you will check it.
- Keep it to one or two weeks.
Watch three things while it runs. How many questions they ask before building, because the ones who ask nothing usually build the wrong thing. Whether they document as they go. And whether, at the end, you could hand what they built to someone else.
What good work looks like when it arrives
Three months in, you should be able to open a lead record and read the story of it: where it came from, what was said to it, what the system decided, and what happens next. You should have one number that moved and a reason you believe it. And there should be a document that lets a second person operate the thing without calling the first.
If instead you have a lot of impressive machinery that only one person understands, you did not hire a GTM engineer. You acquired a dependency.
If you want to skip the search
MitHub keeps a small roster of people who have already done this work inside real companies, with the deployments written up and open to read. Browsing and contacting them is free.
See the GTM engineers and read what each one has actually shipped before you talk to anyone.