Fractional CTO for AI startups and SaaS. 17 years building companies and revenue systems. Available for CTO as a Service, AI GTM, and RevOps engagements.https://petrenko.cv/https://petrenko.cv/posts/building-from-1-to-70-what-id-do-differently/https://petrenko.cv/posts/building-from-1-to-70-what-id-do-differently/I scaled Webinse from a solo operation to a 70-person agency. Here's what I got wrong along the way, and what I'd change if I were doing it again.Fri, 01 May 2026 11:00:00 GMThttps://petrenko.cv/posts/how-i-structured-gtm-for-dev-led-saas/https://petrenko.cv/posts/how-i-structured-gtm-for-dev-led-saas/Developers don't respond to the same playbook as SMB buyers. Here's how I think about go-to-market when the buyer is technical and the discovery happens on GitHub.Fri, 01 May 2026 10:00:00 GMThttps://petrenko.cv/posts/what-a-fractional-cto-actually-does/https://petrenko.cv/posts/what-a-fractional-cto-actually-does/Most founders picture a fractional CTO as a part-time engineer. The actual job is different — and understanding that difference is how you get value from the engagement.Fri, 01 May 2026 09:00:00 GMThttps://petrenko.cv/posts/building-ai-software-and-growth-systems/https://petrenko.cv/posts/building-ai-software-and-growth-systems/A short introduction to Sam Petrenko's work across AI software, engineering leadership, and growth systems.Thu, 30 Apr 2026 11:00:00 GMT