A fractional CTO is a senior technology executive who works with your company part-time on an ongoing basis, usually a few days per month. You get the judgment and the accountability of the role without the cost or commitment of hiring for it full-time.
What the role covers
The core of the job is the decisions a development team shouldn't make alone. Cloud or on-prem. Build or buy. Whether the architecture will hold up under projected growth. Those calls need one person weighing cost, risk, business direction, and technical detail together.
Around that sit a few recurring responsibilities: owning a roadmap that connects engineering work to where the business is going, standing up programs the company needs but has never built (a security program is the usual one, and a standalone Linera Tech engagement in its own right), setting the development and review standards a growing team can follow, evaluating vendors before they become dependencies, and speaking for the technology in customer, board, and partner conversations.
What it isn't
The part-time arrangement covers hours, not ownership. A fractional CTO carries the consequences of the calls they make and is still there when one of them goes wrong, which is the line between this and traditional consulting.
It also isn't a development seat. Dropping into the codebase to diagnose something hard is fair game, but a calendar full of feature work means the leadership part isn't happening. Standups, sprint planning, and task assignment belong closer to the work.
When it fits
The usual pattern is a development team with no senior technology leader above it, or a technical co-founder who has moved into a different role. Companies at an inflection point feel it first: scaling, preparing for an audit, planning a migration. If the need is consistent but doesn't justify a full-time salary, that's the case the model is built for, and how Fractional CTO / Technology Leadership engagements get scoped.
One caveat before you start looking. CTO is a bundle of jobs, and not every company needs all of them from one person. Sometimes the right answer is an engineering lead or an architect instead. If you're not sure which one you need, start with Do You Need a CTO, or Do You Need Something Else? For what the job looks like day to day, read What a Fractional CTO Actually Does.