CTO

What is a CTO?

A Chief Technology Officer (CTO) is the most senior technical executive at a company — responsible for the company's technical vision, architecture decisions, engineering culture, and the quality of what gets built. At a startup, the CTO role is highly variable: at pre-Seed, the CTO is often a founder writing code. At Series B+, the CTO is increasingly focused on technical strategy, external credibility, and enabling the engineering organization to scale.

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When do you hire a CTO externally?

External CTO hires are most common when a non-technical founding team needs technical leadership from day one, when a company is transitioning from product-market fit to engineering scale and needs a senior technical voice, or when the existing technical leadership isn't equipped for the company's next stage. Many Series B+ companies hire a VP of Engineering to handle operations and retain a technical co-founder or senior engineer as CTO for strategy.

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Common titles for this role

• Chief Technology Officer
• CTO
• Head of Engineering (at early stage)
• Technical Co-Founder
• VP of Engineering and Architecture

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What does a CTO do at a startup?

• Set and communicate the company's technical vision and architecture direction
• Make or ratify major technology decisions: stack, infrastructure, architectural patterns
• Build and maintain engineering culture: hiring bar, values, ways of working
• Partner with the CEO on product strategy, fundraising, and customer conversations
• Represent engineering externally: investors, enterprise customers, technical recruiting
• Manage the VP of Engineering or directly manage engineering managers in smaller orgs
• Stay current with technology landscape and identify opportunities to gain technical advantage

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Key skills and qualifications

• Exceptional technical depth — credible to senior engineers and board members alike
• Track record of making consequential architecture decisions that held up at scale
• Strong leadership: has built or significantly shaped an engineering organization
• Product and business acumen — technical decisions made in service of company outcomes
• Executive communication: presents to boards, customers, and investors with clarity
• Experience scaling engineering teams through at least one order-of-magnitude growth phase

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Why hire your CTO through RFS?

• CTO is the highest-stakes technical hire — we approach this with the rigor it requires, including reference checks and in-depth technical screening
• 29-day average time to hire — CTO searches typically take 3–6 months externally; our warm network compresses that significantly
• 300+ placements at VC-backed companies including executive and C-suite roles
• We understand the difference between a coding CTO (early stage) and a strategic CTO (scale-up) — and we find the right fit for your stage
• No upfront fees — contingency model