Comparison
Head of Engineering vs CTO: Which Hire Fits Your Stage
Founders often ask us whether their next senior engineering hire should be a CTO or a Head of Engineering. The confusion is understandable: job titles in this space are inconsistent, and the right answer depends less on title and more on what your business actually needs at its current stage. This article sets out the difference between the two roles, when each one fits, and how to run the hiring process properly.
What each role actually does
A CTO is a strategic role. They set technical direction, make build versus buy decisions, own architecture at a high level, represent engineering to the board and investors, and often have a stake in product and commercial strategy. In an early-stage startup, the CTO may also write code.
A Head of Engineering is an operational leadership role. They run delivery, own hiring and team structure, manage engineering managers or senior ICs, and make sure the roadmap ships on time and to quality. They rarely sit on the board and are less involved in fundraising conversations, but they are deeply involved in how the team actually works day to day.
The overlap causes most of the confusion. Both roles touch architecture, hiring and technical decisions. The difference is altitude: CTO is strategy and external representation, Head of Engineering is execution and internal management.
When a CTO fits your stage
A dedicated CTO makes sense when you need someone to own technology as part of business strategy, not just delivery. This is typical for:
- Pre-seed to Series A companies where technical direction is still being set
- Businesses raising investment, where technical credibility with investors matters
- Companies in regulated or technically complex sectors, such as fintech or AI and data, where architecture decisions carry real risk
- Founding teams that need a technical co-founder rather than an employee
At this stage, the CTO is often still hands-on, reviewing code, pairing with engineers, and making calls that shape the product for years to come.
When a Head of Engineering fits your stage
A Head of Engineering becomes the right hire once the team has grown enough that delivery, not strategy, is the bottleneck. Common signals:
- You have 10 or more engineers and the CTO is too stretched to manage people properly
- Sprints are slipping, quality is inconsistent, or engineering managers have no clear leader
- The CTO wants to focus on architecture, platform decisions or product strategy rather than one-to-ones and performance reviews
- You are scaling specific functions, such as software engineering, DevOps, or data engineering, and need dedicated operational ownership
In many scale-ups, the Head of Engineering reports to the CTO, or to a VP Engineering if the org has grown further still. The two roles complement rather than compete once both exist.
Where the roles overlap and where they clash
Problems tend to appear when responsibilities are not clearly split. If both a CTO and a Head of Engineering are hired without agreeing who owns architecture decisions, who owns headcount, and who represents engineering externally, you end up with duplicated authority and confused reporting lines. Before hiring either role, write down what decisions sit with whom. This is worth doing even if you currently have only one of the two roles in place, since it clarifies what the next hire should own.
How to hire for either role well
Both roles are high-stakes and low-volume hires, which is why we recommend retained search rather than contingent recruitment for CTO and Head of Engineering searches. The process needs deep reference checking, technical assessment, and cultural alignment with the founding team, not just a fast pipeline. For teams building out under either leader, our software engineering recruitment service and embedded recruitment model can support ongoing hiring once the leadership seat is filled. For context on how these roles are paid, see our UK tech salary statistics and salary benchmarks, or the full UK Tech Salary Report 2026.
How we help
At OpenSource, every candidate we put forward for a CTO or Head of Engineering role is technically screened by our founders before your team meets them, so you are only spending time on people who can genuinely do the job. If you are working out which role you need next, or you are ready to start the search, talk to us.
FAQ
Frequently asked questions
Can one person do both jobs?
Yes, in the early days. A founding CTO or a strong first engineering hire often covers both until the team passes roughly 15 to 20 engineers, at which point the split between strategy and delivery becomes hard to manage alone.
Does a Head of Engineering need to be technical?
Yes. They need enough technical depth to review architecture decisions, challenge estimates, and earn credibility with senior engineers, even though their day-to-day focus is delivery, process and people.
Should the CTO or the Head of Engineering own hiring?
The CTO usually owns the engineering hiring strategy and bar, while the Head of Engineering runs the operational side, working with recruiters on pipeline, interviews and offers.
Is a CTO always more senior than a Head of Engineering?
Not necessarily in skill, but usually in scope. The CTO sits on the leadership team and owns technology strategy, while the Head of Engineering typically reports into the CTO or into a VP Engineering and focuses on execution.