Job Title
Machine Learning Engineer
Salary
£100k-£140k + Equity
Company Description
Usepassionfruit.com is a $14M Series A startup backed by Seaya, firstminute, and Playfair, building an AI-native teammate for marketing teams. We are automating complex marketing operations—from campaign briefs to paid media analysis—for mid‑market brands with high-performance, autonomous agentic systems.
Job Description
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.
Location
London, UK
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.
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.
The ideal candidate
- 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.
Machine Learning Engineer (£100k-£140k + Equity) at Usepassionfruit employer: Jack & Jill
At Jack & Jill, we pride ourselves on being an exceptional employer that fosters a dynamic and innovative work culture. Our team enjoys a range of benefits including flexible working arrangements, professional development opportunities, and a collaborative environment that encourages creativity and growth. Located in a vibrant area, we offer unique advantages such as access to cutting-edge technology and the chance to work with industry leaders in AI-driven marketing strategies.
