Fractional Founding Product Marketing Manager

ArcellAI is building the context layer for AI-native engineering. They are seeking a Founding Fractional Product Marketing Manager to help define market understanding and category positioning, working closely with the founder to shape messaging, go-to-market strategies, and product launches.

Responsibilities:

• Own positioning and messaging across products and markets
• Help define and evolve our category narrative
• Develop customer-facing collateral including decks, one-pagers, case studies, demos, and website content
• Create launch plans for new product capabilities
• Interview customers and synthesize market insights
• Conduct competitive and market research
• Work closely with engineering to translate technical capabilities into business value
• Support fundraising and enterprise sales with messaging and strategic content
• Build repeatable product marketing processes as the company scales

Requirements:

• Product Marketing at an enterprise SaaS or AI company
• Technical products, developer tools, data infrastructure, AI platforms, healthcare AI, or enterprise software
• Category creation or early-stage startups
• Exceptional technical storytelling
• Strong writing and presentation skills
• Customer discovery and market research
• Ability to operate with significant autonomy
• Healthcare, biotech, life sciences, defense, or manufacturing
• AI agents, LLMs, data infrastructure, or knowledge graphs
• Founder or first marketing hire experience