One CTO in a roadmap meeting. Another reviewing the architecture of a microservice. A third answering engineering questions in Slack at 11 PM.
In all three cases, the CTO is doing Staff Engineer work. It's not those CTOs' fault — they're filling a real vacuum. But the cost to the company is high, and often invisible.
What a CTO does (or should do)
The CTO role is fundamentally strategic and external. Good CTOs spend most of their time on:
- Alignment between business strategy and technical strategy
- Building and evolving the engineering organization — hiring, structure, culture
- Relationships with investors, partners, and customers at the technical level
- Technology decisions that impact long-term competitiveness
- Representing engineering at the board and in product decisions
The CTO looks outward and toward the future. When a CTO is buried in implementation decisions, the company's technical future has no owner.
What a Staff Engineer does (or should do)
The Staff Engineer operates internally, with deep technical focus. Their typical work includes:
- Long-term technical vision for architecture and systems
- Defining standards, guides, and decisions that multiple teams follow
- Leading high-impact, high-complexity technical projects
- Mentoring senior engineers and creating an environment of technical growth
- Bridging teams' technical needs with the company's strategic direction
The Staff Engineer looks inward and at the present. They ensure that what's being built today is being built right.
Why the roles get confused
The confusion happens for two main reasons:
1. The company grew without filling the role. The founding CTO was the company's original Staff Engineer. As the company grew, the CTO role evolved — but nobody took on the deep technical work. The CTO absorbs it because there's no alternative.
2. The CTO prefers technical work. Many CTOs arrived at the position from technical tracks. The strategic and organizational part is less familiar, sometimes less comfortable. It's easier, and more satisfying in the short term, to solve an architecture problem than to build a technical recruiting process.
In both cases, the result is the same: the CTO's strategic work gets compressed, and Staff Engineering work is being done by someone who commands a very high opportunity cost to be in that function.
The real cost of the overlap
When the CTO is in Staff Engineer mode, some things stop happening:
- Long-term technical strategy is not thought through deeply
- The engineering organization develops without intentionality
- Business decisions with technical implications are made without adequate input
- The CTO becomes reactive — fighting fires instead of preventing them
- Product and market opportunities are missed because tech can't keep up
Meanwhile, Staff Engineering work is being done by someone who doesn't have the time, focus, or correct mandate to do it well.
How to separate the roles in practice
The separation is not about hierarchy — it's about clarity of scope and responsibility.
The CTO defines where the technical organization needs to go. The Staff Engineer defines how to get there and ensures teams are on the right path. They are partners, not rivals.
In early-stage companies, the CTO may accumulate both roles for a while — but with awareness of doing so and a clear plan for when and how to separate them. In companies with more than 15–20 engineers, the overlap starts to have measurable cost.
When the Staff Engineer comes from outside
For companies that don't have an internal Staff Engineer or need external perspective, bringing in an on-demand Staff Engineer is an efficient way to solve the problem without the costs and risks of a full-time hire.
A consulting Staff Engineer comes in for a defined scope (architecture of a new product, technical elevation of a team, diagnosis of a legacy system) and frees the CTO to return to the work only they can do.
The question many CTOs ask after that experience is simple: "Why did I wait so long to do this?"