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.

She will pick the best candidates from Jack's network.

The next step is to speak to Jack.

Job Title: Founding Marketer – Head of Growth

Salary: £50k–£80k + 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, you’ll own the full funnel—from paid social and CRO to retention—disrupting 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 brand’s digital presence by identifying and exploiting high-growth channels and creating content that resonates with a younger, digitally-native audience.

The ideal candidate:

• 2–3+ 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, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're 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 I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's 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 you're 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 isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't 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 we're giving his services away for free.