Skip to main content
Back to all jobs

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.

Overview

Role overview

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.

Company

Magentic

Magentic

Software

Sequoia-backed AI startup transforming the $3tn global procurement market

Responsibilities

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.

Candidate profile

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.

What makes it remarkable

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  • Own the entire marketing function for a startup disrupting a $3tn market that currently relies on outdated manual spreadsheets and email threads.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.

Jack & Jill

How Jack & Jill work together

Jack
I get to know what you’re great at, then find roles you’d never find yourself.
Jill
I recruit from Jack’s network and make the intro when I spot a great match.

Meet Jack

Thumbnail for Meet Jack

Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.

How does this work?

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 it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.

Find a job with Jack

Ready to find your next role?

Talk to Jack for 10 minutes and see your first matches.