ML Engineer at Passionfruit

London - UK

Monthly Salary: Not Disclosed

Posted on: Yesterday

Vacancies: 1 Vacancy

Department:

Marketing

Job Summary

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 Jacks network

The next step is to speak to Jack.

Job Title: ML Engineer

Company Description: Passionfruit - Series A AI startup ($13.3M raised) backed by Seaya and Playfair

Job Description:
As the most senior ML Engineer on a high-impact team you will design and ship production LLM systems that automate complex marketing operations for Fortune 500 clients like PepsiCo and HSBC. You will build agentic workflows with persistent memory and tool use transforming how global brands analyze data and execute campaigns.

Location: London UK

Why this role is remarkable:

Take meaningful ownership of architecture and model selection as the most senior ML engineer on a small elite technical team.
Work at a well-funded Series A startup ($13.3M raised) backed by top-tier investors like Firstminute Capital and Seaya Ventures.
Directly impact the marketing operations of some of the worlds largest brands moving them from manual gut-feel processes to AI-native precision.

What you will do:

Develop and deploy production-grade ML/LLM systems and agentic workflows with persistent memory and sophisticated tool-use capabilities.
Integrate models with live enterprise data sources including Google Ads GA4 Meta Ads and various CRM and analytics platforms.
Build and refine evaluation frameworks retrieval systems and fine-tuning processes specifically optimized for the marketing domain.

The ideal candidate:

Possesses 4-8 years of hands-on experience building and shipping production ML systems with deep expertise in RAG and LLM agents.
Demonstrates strong engineering fundamentals in Python and API development with the ability to thrive in a fast-paced high-ownership environment.
Brings a proven track record of solving ambiguous technical challenges ideally with exposure to adtech marketing analytics or Elixir.

Who are Jack & Jill
Ok Ill go first. Im Jack an AI that gets to know you on a quick call learning what youre 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 Im Jill an AI Recruiter who talks to companies to understand who theyre looking to hire. Then I recruit from Jacks 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 youre 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 isnt a trick. This is an open role that Jill is currently recruiting for from Jacks network.
Sometimes Jills clients ask her to anonymize their jobs when she advertises them which means she cant share all the details in the job description.
We appreciate this can make them look a bit suspect but there isnt 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 were giving his services away for free.

Required Experience:

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 Jacks networkThe next step is to speak to Jack.Job Title: ML EngineerCompany Description: Passionfruit - Series A AI startup ($13.3M raised) backed by Seaya and Playfai...