At a Glance
- Tasks: Design and deploy cutting-edge ML systems for top global brands.
- Company: Passionfruit, a well-funded AI startup transforming marketing operations.
- Benefits: Competitive salary, equity options, and a dynamic work environment.
- Other info: Join a small elite team and enjoy excellent career growth opportunities.
- Why this job: Make a real impact on Fortune 500 marketing strategies with innovative AI solutions.
- Qualifications: 4-8 years in ML systems, strong Python skills, and adtech experience.
The predicted salary is between 80000 - 100000 £ 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.
ML Engineer at Passionfruit employer: Jack & Jill
At Passionfruit, we pride ourselves on being an exceptional employer, offering a dynamic work culture that fosters innovation and collaboration. As a Series A AI startup based in London, we provide our ML Engineers with meaningful ownership over cutting-edge projects, competitive compensation, and opportunities for professional growth within a supportive team environment. Join us to make a tangible impact on the marketing operations of global brands while working alongside top-tier investors and industry leaders.
StudySmarter Expert Advice🤫
We think this is how you could land ML Engineer at Passionfruit
✨Tip Number 1
Network like a pro! Reach out to people in the industry, especially those at Passionfruit or similar startups. A friendly chat can open doors that a CV just can't.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your ML projects, especially those related to marketing analytics. This is your chance to demonstrate how you can transform data into actionable insights.
✨Tip Number 3
Prepare for the interview by diving deep into Passionfruit's work and their clients. Understand their challenges and think about how your experience can help them move from manual processes to AI-driven solutions.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen. Plus, we love seeing candidates who take the initiative to connect directly with us.
We think you need these skills to ace ML Engineer at Passionfruit
Some tips for your application 🫡
Tailor Your CV:Make sure your CV is tailored to the ML Engineer role at Passionfruit. Highlight your experience with production ML systems and any relevant projects that showcase your skills in Python and API development.
Craft a Compelling Cover Letter:Your cover letter is your chance to shine! Use it to explain why you're excited about working at a Series A startup like Passionfruit and how your background aligns with their mission to transform marketing operations.
Showcase Relevant Experience:When detailing your experience, focus on specific projects where you've built or deployed ML systems. Mention any work with LLMs or adtech, as this will resonate well with the team at Passionfruit.
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to see your application and get you into the process quickly. Plus, it shows your enthusiasm for joining our team!
How to prepare for a job interview at Jack & Jill
✨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, focusing on the challenges you faced and how you overcame them.
✨Showcase Your Problem-Solving Skills
Prepare to tackle some technical challenges during the interview. Think of examples where you've solved ambiguous problems, particularly in adtech or marketing analytics. This will demonstrate your ability to thrive in a fast-paced environment.
✨Understand the Company’s Impact
Research Passionfruit and its clients like PepsiCo and HSBC. Understand how their marketing operations can benefit from AI. Being able to articulate this will show your genuine interest in the role and the company’s mission.
✨Be Ready for Technical Questions
Expect questions about Python, API development, and integrating models with live data sources. Practise explaining your thought process clearly and concisely, as communication is key in a senior role.
