Through O2A Labs, I work with early-stage founders and agencies that need experienced technical leadership — without hiring a full-time CTO.

What I do

  • Fractional CTO — Ongoing technical direction and leadership, typically two to four days a month.
  • Software architecture — An independent look at your system, its constraints, and the decisions that matter next.
  • AI and software delivery — Practical help designing and building software, including AI where it solves a real problem.
  • Technical due diligence — Assessing a team, product, or codebase before you invest, acquire, or commit.
  • Engineering leadership — Hiring, team structure, process, and mentoring for teams that need to grow without slowing down.

Who I work with

I’m usually the right fit for early-stage founders building a first product or team, and for agencies and consultancies that need architecture or delivery support on client work.

How it works

  1. An intro call. No cost, no pitch. We work out whether there’s a fit.
  2. Scoped work. I propose a defined engagement: an assessment, a specific piece of delivery, or an ongoing arrangement.
  3. Ongoing involvement. Usually two to four days a month, working directly with your team.

When a project needs more hands, I bring in a small group of trusted associates. I lead the work and stay accountable for it.

Where I work

I’m based in the UK and work remotely with clients across the UK, the United States, and Europe.

Start a conversation

Tell me what you’re building, where you’re stuck, and what needs to happen next.

info@marcotroisi.com

Prefer a form? Use the O2A Labs enquiry form.

More about O2A Labs.