Founding Marketer Head of Growth (50k–80k + Equity) at S3 Sensitivity Science

This is a job that Jill our AI Recruiter is recruiting for on behalf of one of our customers.

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Job Title: Founding Marketer Head of Growth

Salary: 50k80k Equity

Company Description: S3 Sensitivity Science D2C healthcare disruptor founded by Skin Me and Life Supplies alumni.

Job Description:
As the first marketing hire you will build the entire growth engine from scratch for a proprietary oral healthcare brand. Working directly with founders who scaled previous ventures to 70M ARR youll own the full funnelfrom paid social and CRO to retentiondisrupting a stagnant market dominated by Sensodyne.

Location: London UK

Why this role is remarkable:

• Partner with a proven founding team including the co-founder of Skin Me to launch a clinically superior product into a massive global category.

• Gain true founding-level equity and total autonomy to build the marketing playbook and function without the constraints of legacy corporate structures.

• Work in an AI-native environment where speed and high-agency execution are the default supported by proprietary formulation technology that outperforms the current market leader.

What you will do:

• Architect and execute the full-stack growth strategy across Meta/paid social email/SMS flows and Shopify CRO to drive the Summer 2026 launch.

• Own the commercial North Star metrics including CAC ROAS and LTV translating marketing activities into sustainable revenue and unit economic success.

• Scale the brands digital presence by identifying and exploiting high-growth channels and creating content that resonates with a younger digitally-native audience.

The ideal candidate:

• 23 years of hands-on D2C growth experience at a UK challenger brand (e.g. Huel Surreal or Grind) or a fast-paced performance agency.

• Founder-minded operator who is AI-native and moves fast without needing a brief optimized for equity upside and long-term value creation.

• Deeply analytical with a mastery of paid social mechanics and a relentless drive to absorb D2C marketing crafts and emerging industry trends.

Who are Jack & Jill
Ok Ill go first. Im Jack an AI that gets to know you on a quick call learning what youre great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up supporting you with applications interview prep and moral support.
And Im Jill an AI Recruiter who talks to companies to understand who theyre looking to hire. Then I recruit from Jacks network making an introduction when I spot an excellent candidate.

Next steps
Step 1. Visit our website.
Step 2. Click Talk to Jack.
Step 3. Talk to Jack so he can understand your experience and ambitions.
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
Step 5. If Jill thinks youre a great fit and her client wants to meet you they will make the introduction.
Step 6. If not Jack will find you excellent alternatives. All for free.

We never post fake jobs
This isnt a trick. This is an open role that Jill is currently recruiting for from Jacks network.
Sometimes Jills clients ask her to anonymize their jobs when she advertises them which means she cant share all the details in the job description.
We appreciate this can make them look a bit suspect but there isnt much we can do about it.
Give Jack a spin! You could land this role. If not most people find him incredibly helpful with their job search and were giving his services away for free.

Required Experience:

Director