Founding Product Marketer

Location: On-site · Cambridge, MA  
Team: Founding (reports to CEO)  
Comp: Competitive salary + meaningful equity


⚡ About Ray

As Ray's Founding Marketer, you'll build our growth engine from scratch. You will start by defining our ideal customer and core message, then shift to hands-on execution—launching the initial campaigns and experiments that will drive sustainable customer acquisition and set us up for long-term success.


💡 About The Role

As Ray’s founding Marketer, you’ll help us build demand-generation and product-led growth, from first impression to habit-forming retention. Reporting to the CEO in our Cambridge HQ, you’ll help build the buzz that creates early adoption and run lightning-fast experiments to grow our user base.

🧠 Your focus

  • Deeply understand our users and define our Ideal Customer Profile (ICP) through qualitative interviews, surveys, and data analysis.

  • Develop Ray's core messaging, positioning, and value propositions that will serve as the foundation for all marketing efforts.

  • Own the go-to-market (GTM) strategy, identifying the most promising channels for reaching our target audience.

  • Begin testing and validating our messaging on 1-2 core channels with scrappy, low-cost experiments.

  • Own our content and social media presence, creating initial assets that speak directly to our ICP.

  • Identify growth opportunities (onboarding, activation, retention) via user interviews and analytics.

✅ Skills Needed

  • 2-5 years in product marketing (ideally for a mobile or consumer subscription product).

  • Exceptional communication and writing skills, with the ability to develop strong messaging that cuts through the noise.

  • Proven ability to conduct qualitative customer research (interviews, surveys) and translate those insights into actionable marketing strategies.

  • Hands-on experience managing multiple marketing functions, including content, social media, email, and basic paid acquisition.  

  • A "doer" mentality with a portfolio of work (e.g., copy you've written, campaigns you've run, landing pages you've built).

  • Big bonus points if you use Ray - we live our customer journey daily.


🚀 What Success Looks Like

  • 45-Days: You’ve conducted 15-20 customer interviews, developed insights and a core messaging framework, and developed baseline marketing metrics.

  • 90-Days: You’ve launched initial tests of the messaging framework on 1-2 core channels, learning from our first cohort, and evolving your initial GTM plan.

  • 6-Months: Repeatable acquisition engines that 10× active users and set us up for Series-A-level scale.


❤️ Why You’ll Love It

  • Shape the AI fitness category and help people stay healthy. 

  • Move fast - prototype daily, test on yourselves, launch, and learn.

  • Do career-defining work with people who care. Focused, brilliant teammates, plenty of laughs, zero bureaucracy.

  • Own real upside. (Equity is tied directly to your impact).


Ready to Lead Growth at Ray?

Send a quick note on how you've helped companies grow early audiences—plus your résumé or LinkedIn—to jobs@rayfit.com. We review every application personally and move fast.