george psistakis

~ $ whoami

A hands-on fractional head of growth who builds the growth systems, not just directs them.

Engineer-turned-founder with three exits. I build growth for early-stage startups whose users try before they buy: engineers, data teams, sound designers, creators.

now
running go-to-market for two technical B2B companies, an agentic AI security startup and a cloud platform. Positioning, SEO, paid, tracking and CRM, all one person's job.
stage
pre-seed to Series A, $0–10M ARR
based
Athens, working with US and European teams
get in touch linkedin github

the problem

  • Product work eats the week.
  • The first senior marketing hire leaves.
  • The agency runs campaigns and nobody owns strategy.

I do the step before that hire.

how it runs

  1. 01Positioning
  2. 02Channelscontent, SEO, AI search, paid, social
  3. 03Measurementtracking, consent, CRM
  4. 04Run it weeklyexperiments and reports
  5. 05Hand overto your first marketing hire
AI agentswatch the accounts · pull reports · log every change

AI agents propose and report. I approve anything that moves budget or changes a live page.

First weeks: I read what's already running (analytics, ad accounts, CRM, the last year of content), talk to you and your team, and change nothing until we can say what's working and what isn't. Then we agree the first three priorities.

AI-native marketing

Systems engineer, then founder, then AI-native marketer. I run growth on AI agents and skills built in Claude Code and Codex (skills, subagents, MCP), and use Gemini or Grok depending on the job.

# part of the skill library I run on Claude Code and Codex
skills/
├── linkedin-ads-kit/        # 10 skills: strategy, copy, build, analysis
├── google-ads-expert/
├── x-ads-expert/
├── seo-expert/               # SEO and AI search
├── gtm-consent-auditor/      # tracking and consent audits
├── hubspot-expert/
└── plg-activation-expert/

track record: three companies I helped build, three acquisitions

ended in acquisitioncurrentpast
  • Blendo → RudderStack. Co-founded it and ran growth from beta to 120+ customers, cash-flow positive, and moved it from sales-led to product-led.
  • Accusonus → Meta. As Head of Marketing, I led a team of 7 and built the growth channels and the 1.5K-creator partner program behind a 300% MRR increase.
  • Alcion → Veeam. Built the growth engine from the first customer to acquisition, including paid acquisition that grew trial signups for six quarters in a row.

since then

  • Agentic AI security startup, 2025–now. Full go-to-market: positioning, launch, SEO and AI search, paid and outbound.
  • Cloud platform for technical teams, 2023–now. Google Ads pipeline, SEO recovery after a site migration, HubSpot and conversion tracking.
  • Agentic AI SRE startup, 2024–2026. Built growth and PLG from scratch as one person with AI agents.

stack

build and AI

  • Claude Code
  • Claude Cowork
  • Grok Bot
  • Grok Build CLI
  • Claude Managed Agents
  • Codex
  • Gemini CLI
  • MCP
  • Zapier
  • Lovable
  • GitHub
  • Obsidian

video and design

  • Midjourney
  • Canva
  • HyperFrames
  • Remotion
  • HeyGen
  • Higgsfield
  • Figma

performance channels

  • Google Ads
  • LinkedIn Ads
  • Bing Ads
  • X Ads
  • Meta Ads
  • ChatGPT Ads

SEO and content

  • WordPress
  • DataForSEO
  • Screaming Frog
  • SpyFu
  • Google Search Console
  • Bing Webmaster Tools

data and tracking

  • GA4
  • Google Tag Manager
  • Segment
  • Mixpanel
  • Microsoft Clarity

CRM and outbound

  • HubSpot
  • Clay
  • Origami
  • Sumble
  • Dripify

fit

good fit

  • Pre-seed to Series A
  • Developer, data, AI, security, audio or creator tools
  • No marketing team yet, or a small team that needs a hands-on lead

not a fit

  • One channel only
  • Advice without execution

faq

What does a hands-on fractional head of growth do?

I work as your head of growth: positioning, product-led growth, content and SEO, paid and digital marketing, email, tracking and the CRM, hands-on, with senior judgment behind each piece. One person, one monthly retainer, no agency layer between you and the work.

How much time do you spend with us?

Usually 8 to 20 hours a week. I run agents I built to handle the monitoring and reporting, so those hours go to strategy and the work that needs a person.

Do you only work with technical products?

I work with products whose users know their craft: developer, data, AI and security tools, and also audio, video and creator tools.

What happens when we hire a marketer?

I help you define the role and interview candidates. Then I hand over the channels, the tracking, the reports and the record of what we decided and why.

Where are you based?

Athens, Greece. I work remotely with teams in the US and Europe, and my afternoons overlap with US East Coast mornings.

contact

Founder in this spot, or know one? Write to me.

george@gpsistakis.com

Or message me on LinkedIn.