As the first growth hire, you will build the marketing engine from zero-to-one for a category-defining AI platform. Working directly with the CEO, you will define the ideal customer profile, craft compelling narratives for enterprise manufacturers, and run rapid experiments across acquisition channels to turn early signals into repeatable growth playbooks.
Founding Growth Marketer at Magentic
We are looking for a Founding Growth Marketer to join a Sequoia-backed AI startup in London. With a team from OpenAI and Meta, this company is automating the $3tn procurement industry using next-gen agentic systems. You’ll work directly with the CEO to build the marketing engine from scratch, defining the ICP and narrative for a category-defining product. If you have a track record of driving B2B startup growth and want meaningful equity in a high-caliber team, this is the definitive zero-to-one role in the London AI scene.
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Location
London, United Kingdom
Compensation
£90k-£100k + Equity
Company
Magentic
Role overview
Software
Sequoia-backed AI startup transforming the $3tn global procurement market
What you will do
- Design and execute rapid-fire experiments across the full marketing stack to establish a scalable acquisition playbook for AI agents.
- Collaborate with the CEO to refine buyer personas and build the narrative for an autonomous procurement co-pilot.
- Leverage modern AI tools and analytics to track performance and translate customer insights into product improvements and messaging.
Who this is a fit for
- Proven experience driving measurable growth as an early or first marketing hire at a B2B enterprise startup.
- Exceptional ability to blend analytical thinking with creative storytelling to make complex industrial procurement processes feel exciting.
- Highly experimental mindset with a strong bias for execution, comfortable moving fast in a high-stakes, zero-to-one startup environment.
Why this role is remarkable
- Join a prestigious founding team featuring expertise from OpenAI, Meta, Revolut, NASA, and McKinsey, backed by world-class investors like Sequoia Capital.
- Own the entire marketing function for a startup disrupting a $3tn market that currently relies on outdated manual spreadsheets and email threads.
- Benefit from a high-growth environment with meaningful founding equity, visa sponsorship availability, and a hybrid culture designed for deep collaboration.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.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.
I recruit from Jack’s network and make the intro when I spot a great match.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.
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Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Magentic wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.