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- Tasks: Design and deploy cutting-edge ML systems for top global brands.
- Company: Passionfruit, a dynamic Series A AI startup with $13.3M raised.
- Benefits: Competitive salary, impactful work, and a chance to shape the future of marketing.
- Other info: Join a small elite team and enjoy excellent career growth opportunities.
- Why this job: Take ownership in a high-impact role and transform marketing operations with AI.
- Qualifications: 4-8 years of experience in ML systems and strong Python skills.
The predicted salary is between 70000 - 90000 £ per year.
Company Description: Passionfruit - Series A AI startup ($13.3M raised) backed by Seaya and Playfair.
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 world's 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.
Next steps:
- Visit our website.
- Click 'Talk to Jack'.
- Talk to Jack so he can understand your experience and ambitions. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
- If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction. If not, Jack will find you excellent alternatives.
All for free. We never post fake jobs. This isn’t a trick. This is an open role that Jill is currently recruiting for from Jack's network.
ML Engineer at Passionfruit employer: Jack & Jill/External Ats
Contact Detail:
Jack & Jill/External Ats Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land ML Engineer at Passionfruit
✨Tip Number 1
Get to know Jack! He’s your go-to AI for understanding what you bring to the table and what you want from your career. A quick chat with him can open doors to opportunities that fit your skills perfectly.
✨Tip Number 2
Don’t just wait for jobs to come to you; be proactive! Use our website to connect with Jack and get tailored advice on how to stand out in your job search. The more engaged you are, the better your chances!
✨Tip Number 3
Prepare for your chat with Jack by brushing up on your experience and ambitions. The clearer you are about what you want, the easier it is for him to match you with the right roles. Confidence is key!
✨Tip Number 4
Remember, Jill is on the lookout for great candidates! If she thinks you’re a good fit, she’ll make the introduction. So, make sure to showcase your skills and experiences during your conversation with Jack.
We think you need these skills to ace ML Engineer at Passionfruit
Some tips for your application 🫡
Show Off Your Skills: Make sure to highlight your hands-on experience with ML systems in your application. We want to see your expertise in action, so don’t hold back on showcasing your projects and achievements!
Tailor Your Application: Customise your CV and cover letter to match the job description. Use keywords from the listing to demonstrate that you understand what Passionfruit is looking for. This helps us see how you fit into the role!
Be Clear and Concise: Keep your application straightforward and to the point. We appreciate clarity, so avoid jargon unless it’s relevant. Make it easy for us to see why you’re the perfect fit for the ML Engineer position.
Apply Through Our Website: Don’t forget to apply through our website! It’s the best way for us to connect you with Jack and ensure your application gets the attention it deserves. Plus, it’s super easy!
How to prepare for a job interview at Jack & Jill/External Ats
✨Know Your ML Stuff
Make sure you brush up on your machine learning fundamentals, especially around LLM systems and RAG. Be ready to discuss your past projects in detail, showcasing how you've tackled complex challenges and what impact your work had.
✨Understand the Marketing Landscape
Since you'll be working with big brands like PepsiCo and HSBC, it’s crucial to understand marketing operations. Familiarise yourself with how AI can transform marketing strategies and be prepared to share insights on integrating ML with platforms like Google Ads and Meta Ads.
✨Showcase Your Problem-Solving Skills
Prepare examples of ambiguous technical challenges you've faced and how you approached them. Passionfruit is looking for someone who thrives in a fast-paced environment, so highlight your adaptability and innovative thinking.
✨Ask Insightful Questions
At the end of the interview, don’t shy away from asking questions. Inquire about the team dynamics, the tech stack they use, or how they measure success in their ML projects. This shows your genuine interest in the role and helps you assess if it's the right fit for you.