What is a fractional engineering team? A plain guide
What a fractional engineering team is, what it costs, when it beats hiring or an agency, and the failure modes nobody mentions. Written by a company that runs one.
A fractional engineering team is a product team you use part-time. Instead of hiring five people full-time, you book the specialties you need for the time you need them: a full-stack engineer for six weeks, a designer for two, a DevOps engineer for the three days it takes to untangle your deploys. When the work changes, the team changes with it.
We run one of these at Lunar Launch Labs, so you should read this the way you’d read a bakery’s essay about bread. We think the model is right for a lot of companies. We also think it’s wrong for plenty of them, and we’ll be specific about which is which.
The one-sentence version
You pay for engineering by the week instead of by the year.
That’s most of it. Everything else in this guide is consequences of that sentence.
How it works in practice
The mechanics vary by provider, but the shape is usually the same. Here’s ours, since it’s the one we can describe honestly:
- You pick the specialties you need. Ours run from graphic design (from $150/day) up to machine learning and solutions architecture (from $500/day). The full list with rates is on the roles page.
- You book a first week. That week is a real deliverable-producing week, and it’s also a trial. If the fit is wrong, you’ve lost a week, not a quarter.
- After that, you schedule the same people on demand. Sprints, standing days, one-off sessions. Add a role when the roadmap needs it, stand one down when it doesn’t.
The important word in all of that is same. A fractional team that sends you different strangers every engagement is a staffing agency with better marketing. Continuity is the thing you’re actually buying: the person who built your billing integration in March is the person who extends it in June, with the context still in their head.
What it costs, with real numbers
Day rates look expensive next to salaries until you do the whole calculation. A $350/day full-stack engineer booked every single working day costs about $7,000 a month. A full-time senior engineer at $170,000 base costs roughly $14,000 a month in salary alone, and closer to $19,000 once you add employer taxes, benefits, equipment, and the recruiter fee amortized over the first year. We walk through that math line by line in the true cost of hiring a startup engineer.
But that comparison assumes you need someone every day, and most early companies don’t. The honest comparison is between what you’d pay a full-timer and what you’d pay for the days you actually have work. A team that needs serious engineering three weeks out of four, with a design push once a quarter, books very differently from a team shipping every day.
| Situation | Full-time cost/month | Fractional cost/month |
|---|---|---|
| Steady daily work, one engineer | ~$19,000 fully loaded | ~$7,000 (every day booked) |
| Three weeks on, one week off | ~$19,000 (you pay anyway) | ~$5,250 |
| Two engineers during a push, one otherwise | ~$38,000 | ~$10,500 in push months, ~$7,000 otherwise |
Those fractional numbers use our $350/day from-rate. Actual proposals are usually at or below the from-rate, but treat the table as shape, not quote.
The pattern to notice: the more your workload varies, the better fractional looks. If your workload never varies, the gap narrows, and at some point full-time hiring wins. That crossover is real and we’d rather you find it than pretend it doesn’t exist.
Fractional vs. the other options
The full comparison deserves its own article, and it has one: fractional team vs. staff augmentation vs. agency. The compressed version:
Versus hiring: hiring wins when the work is permanent and you want the knowledge to live in an employee. It loses when the work is spiky, when you can’t afford three months of recruiting, or when a bad hire would cost you a quarter of your runway. There’s more on that decision in when to hire your first full-time engineer.
Versus an agency: agencies quote projects. That’s fine when scope is fixed and known, which for startups is approximately never. Fixed-scope pricing also puts the agency’s incentive on defending the spec, not on your outcome. A fractional team prices time, so changing your mind on a Tuesday costs you nothing but the Tuesday.
Versus freelancers: a good freelancer is a fractional team of one, and for a single well-bounded workstream that can be perfect. The trouble starts when you need three specialties that coordinate. Now you’re the project manager, the vetting department, and the person who finds out on Thursday that the designer and the engineer had different ideas about the handoff.
Where the model breaks
We’d rather tell you these than have you learn them mid-engagement.
Deep domain products. If your product is a trading system or a medical device, six months of context is the price of admission for useful work. Part-time people can support a team like that. They can’t be its core.
Companies that can’t write things down. A fractional team runs on written context: tickets, short specs, recorded decisions. If everything important at your company lives in hallway conversation, part-time people will keep missing it. (A full-timer would too, honestly, but they’re around for more hallways.)
Using it to avoid a decision. Some companies use fractional staffing to defer a hire they know they need. The deferral costs more per month than the hire would. If the work is permanent and daily, hire. We say this while selling the alternative, so take it seriously.
One more: if you want someone who wakes up thinking about your company and nothing else, that’s a cofounder or an early employee with meaningful equity. No hourly arrangement replaces that, ours included.
Questions founders ask us
Who manages the team? You do, at the level of priorities: what matters this week, what done looks like. You shouldn’t have to manage the work itself. A decent crew brings its own working rhythm. Ours ships a written end-of-week summary, so scheduling five minutes to read it is the actual minimum. There’s a whole post on running a fractional team week to week.
How fast can it start? For us, typically within 48 hours of a booking. The speed isn’t magic; it’s the point of keeping a vetted network on standby instead of starting a search when you ask.
What about IP and security? Everything is work-for-hire, assigned to you, under NDA, same as an employment agreement would do. Ask any provider to show you the actual contract language before the first week. If they hesitate, that’s your answer.
Is a fractional CTO the same thing? No. A fractional CTO is senior judgment a few hours a week; a fractional team is capacity that ships. Plenty of companies need one and not the other. We wrote up the difference in fractional CTO vs. fractional engineering team.
How to evaluate a provider, including us
Five questions that separate real operations from resume-forwarders:
- Do the same people come back next booking, or do you get whoever’s free?
- Can you scale down without a penalty, or is “flexible” only pointing up?
- Who vets the crew, and against what bar? Ask to see how many candidates they reject.
- What’s the minimum commitment? One week is a trial. Three months is a contract wearing a costume.
- What do you see during the week? Written summaries and a live view of what’s booked, or an invoice at the end of the month?
Our answers are on lunarlaunchlabs.com, and the first week is designed to be the cheapest possible way to check whether we’re describing ourselves accurately.
