It’s a role I’ve naturally grown into over my career — and the one I now bring to founders and scale-ups directly.

Most companies bring one in during a transition, a growth moment, or a leadership gap — when they need fast, credible leadership at short notice. A fractional engagement is often 15–20 hours a week: the judgement of an experienced CTO exactly when it is most expensive to get wrong.

What the role covers

Technology strategy & direction
What to build, why now, and what to stop.
Delivery systems
Process, CI/CD, testing and operational hygiene.
Product & engineering execution
Roadmaps, resourcing and honest trade-offs.
Team building
Hiring, onboarding, structure and leadership.
Scaling
Platform readiness, org and process scaling, reliability.

How I work

I put quality first.

After more than twenty years leading subject matter experts, I’ve learned there are no shortcuts in technology leadership. Real solutions take someone who is willing to get involved, can earn a team’s trust, and sees a client through to the right results.

So that’s what I do. I become your CTO or technology mentor — part-time, but fully committed. I sit in on regular stand-up meetings, review your architecture decisions, talk to your engineers, and tell you the things you might not want to hear.

My job isn’t to validate assumptions — it’s to challenge them when the evidence points to a better path. Usually there’s a good reason a team has committed to an approach: budget, prior commitments, or the information they had at the time. I make sure I understand that first. Then, if I believe a direction will create technical debt, unnecessary cost or downstream risk, I’ll say so plainly, explain the trade-offs in business terms, and bring a realistic alternative with costs and timelines attached. I advise; I don’t dictate — and when your instincts are right, I’ll say that too.

I use AI every day, and I’ve built an AI-native platform on it. But I’ve also seen what happens when AI-generated code ships without anyone truly understanding it — things break in strange ways months later and no one knows why. So every decision that passes through me has a human behind it who can explain and defend it. In regulated, data-sensitive environments especially, that is non-negotiable.

I don’t believe in generating content that looks great in a slide deck. I believe in discovering the right solution for the business — that takes understanding, asking difficult questions, and making decisions one at a time until the correct path is revealed. Sometimes that means re-writing the plan, tackling difficult conversations at either the engineering or C-suite level — often all three.

Ways to engage

Fractional CTO
Ongoing leadership, ~15–20 hours a week. For funded startups and scale-ups without a full-time CTO.
Technical advisor
A lighter retainer — a regular call plus on-demand access. For founders who need judgement, not daily involvement.
Project & due diligence
A time-boxed audit, architecture review or codebase diligence. For a specific question that needs a senior answer.

Let’s work out if I can help.

Tell me where you are and what you’re trying to reach. If a full delivery team is closer to what you need, that’s Rapu.

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