As the second ML hire, you will design and deploy production-grade agentic systems that automate complex marketing operations. You’ll build persistent agents with memory and tool use, integrating deeply with ad platforms and CRMs to handle everything from performance reporting to creative review for high-growth brands like the Atlanta Braves and ADT.
Machine Learning Engineer at Usepassionfruit
As our second ML hire, you'll move beyond AI prototypes to build production-grade agentic systems with memory and tool use. Backed by Seaya and firstminute, we're automating marketing operations for brands like the Atlanta Braves and ADT. If you've shipped RAG pipelines or LLM agents and want to own a production stack in a high-growth London HQ, this is your chance to define how AI actually works for modern marketing teams.
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Location
London, United Kingdom
Compensation
£100k-£140k + Equity
Company
Usepassionfruit
Role overview
Software
Passionfruit provides an AI-powered platform that simplifies a company’s ability to discover, arrange, and engage vetted independent talent, initially in Marketing, while also providing on-project collaboration tooling, empowering all parties to plan, implement, and report on entire work-streams within a single system. It operates as a marketplace for hiring freelance marketing specialists, with offices in London, New York, Portugal, and Italy.
What you will do
- Develop and deploy LLM-powered agentic systems featuring persistent memory, tool orchestration, and multi-step marketing workflow automation.
- Integrate models with live data sources including Google Ads, Meta, and CRMs to create autonomous performance and compliance agents.
- Iterate on RAG pipelines, retrieval strategies, and domain-specific fine-tuning to improve the accuracy and reliability of marketing-specific AI workflows.
Who this is a fit for
- Proven experience building and shipping production ML/LLM systems, specifically involving RAG, agentic frameworks, or complex workflow orchestration.
- Expert proficiency in Python with solid software engineering fundamentals, including experience building robust APIs and data pipelines.
- Thrives in a fast-moving product environment and possesses the technical curiosity to experiment with new technologies like Elixir or specialized marketing analytics.
Why this role is remarkable
- Join a rocket ship that scaled from $0 to $2M ARR in just four months, with usage growing 6x recently and the company nearing profitability.
- Work at the cutting edge of production AI, moving beyond prototypes to deploy agentic systems that handle real-world marketing workflows for enterprise clients.
- Enjoy meaningful ownership as a founding member of the ML team, directly shaping the production stack and product roadmap in a fast-paced environment.
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.
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.
Meet Jack
What happens next?
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 Usepassionfruit wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.