marcus greinke

i build brands precise enough to automate, and the ai systems that run them.

cmo and cgo for marketplaces, fintech, saas and d2c brands, 20+ years across europe and the us. i build the ai operations myself, instead of commissioning slides about them.

available for cmo/cgo roles, interim mandates and ai transformation projects. berlin and remote.

−70%customer acquisition cost at Coya, through systematic testing and UX work
−40%customer acquisition cost at Penta, through rebuilt acquisition funnels
50→90%onboarding completion at Reach Finance, in six months
12×organic social views at mobile.de, year over year
−26%cost per acquisition with an ai creative pipeline at mobile.de
+67%average order value at O.E.L., within three months

what i do.

fractional and interim cmo / cgo

i step in, fix the engine, and leave a team that can run it without me.

ai transformation for marketing teams

copy engines, creative pipelines and agentic workflows. built by me, used by everyone.

brand and messaging systems

positioning and tone of voice, codified precisely enough for machines to execute.

growth engines

acquisition, onboarding and retention, run as weekly experiments against the numbers that matter.

selected work.

mobile.deAdevinta, 2025–now
ai transformation, creative studio

built and validated an ai creative production pipeline for paid social. the best asset ran 41% below campaign average.

designed an ai briefing intake: an agent conversation that produces the brief, the jira ticket and the slack routing, end to end.

12×organic social views, while the average brand account lost reach
orderbird2024–2025, interim
brand strategy and ai

rebuilt the brand into a codified system: positioning, tone of voice, messaging architecture.

then used that precision to run a fully automated llm engine writing on-brand copy for every team: campaigns, product, crm, sales.

1copy engine, company-wide, replacing manual review
O.E.L.2024–2025, interim
premium d2c olive oil

repositioning, two product launches, rebuilt shopify product pages and subscription logic.

contribution margin up from 34% to 57%; lifetime value from €160 to €297; crm orders up 400%.

+67%average order value in three months
Reach Finance2022–2024
co-founder, chief growth officer

bi-weekly, data-driven experiments on a financial planning app. overall conversions tripled.

50→90%onboarding completion in six months
Penta / Qonto2020–2021
chief marketing officer

restructured acquisition funnels and onboarding; go-to-market for international expansion.

−40%customer acquisition cost
Coya / Luko2019–2020
chief marketing officer

built the insurtech's brand and a data-driven marketing culture on Looker and Google Analytics.

−70%customer acquisition cost

earlier.

FAM Brands, vp marketing and ecommerce: athleisure portfolio into europe and asia at up to 40% growth a year.

Ellie, co-founder: a 2,000-strong influencer network driving half of sales.

Charles & Marie: one of the first curated design e-commerce brands, from the us into germany.

The Brand Union, ceo consumer brands: global brand strategy, including Vodafone's global positioning.

about me.

i trained as a designer at Art Center College of Design in Pasadena, ran brand strategy at The Brand Union, founded two companies, and have been cmo or cgo at marketplaces, fintechs and d2c brands since.

since 2024, ai transformation of marketing operations is the core of what i do. not as a strategy deck: i build the systems, then teach the team to own them.

tools i build with

  • Claude Code, MCP integrations, n8n, Langdock
  • ElevenLabs, Leonardo, Kling for creative pipelines
  • GA4, Looker, Tableau, Mixpanel for decisions

native german and english.

marcus.greinke@mac.com