Senior Staff AI Engineer

Build the Future of Wellbeing

Do Your Lifes Best Work

If modern wellbeing were redesigned from scratch it wouldnt live in a GPs office or a cluttered supplement aisle. It would be digital-first beautifully curated and powered by data that actually helps you feel your best.

Thats what were building at Healf. An ecommerce platform at the intersection of personalised health and curated wellbeing. We connect customers with the worlds most effective products across EAT MOVE MIND and SLEEP and were just getting started.

We combine culture-shaping storytelling cutting-edge health tech (like our new blood testing platform Healf Zone) and a best-in-class product experience to help people build rituals that work.

Backed by investors behind Soho House Alo Yoga Cult Beauty and Innocent were scaling fast and redefining how the world shops and lives well.

About Us

At Healf were not just a company were a movement. Founded by two brothers whose own wellbeing journeys inspired our mission to empower others Healf is built on grit determination and a shared understanding of the power of wellbeing.

Our culture is grounded in The Healf Standardfive principles that define how we work and win:

We Work Harder Than Anyone Else: Building something that improves lives takes long hours grit and sacrifice but we thrive on it. We all feel energised by what were building.

Never Settle: We challenge the status quo and push ourselves to be better every day. We never settle for mediocrity or the idea that something cant be done.

Obsession Over Talent: Talent alone isnt enoughrelentless curiosity and a drive to grow set us apart.

The Healf Lifestyle: We live what we preachour personal commitment to wellbeing fuels our professional productivity.

Stronger Together: Everyone owns their lane but we run as a unit.

With Healf Zone on the horizon were entering the next phase of our journey: closing the loop on health with personalised preventative care that unlocks longevity and optimised wellbeing. This is your chance to help build something thats not only extraordinary but a first of its kind.

The Role

The Lead AI Engineer will be a foundational technical leader in designing building and deploying AI systems to drive the growth and feature set of Healf Zone our personalised wellbeing solution.

This role demands deep machine learning expertise a product-focused mindset and the ability to translate complex health data into actionable personalised features for our users specifically accelerating engagement and conversion to the Healf Zone membership offering.

The Lead AI Engineer will work closely with the CTO Engineering and Product teams to ensure all AI systems are directly supporting key business metrics for Healf Zone.

Where Youll Make An Impact

AI & Machine Learning Development

Lead the technical delivery of AI features for Healf Zone ensuring accuracy interpretability and seamless integration with the user experience.

Own the end-to-end MLOps pipeline including model training versioning serving monitoring and continuous improvement in a production environment.

Research and implement state-of-the-art ML models (e.g. deep learning large language models reinforcement learning) to drive innovation in personalisation.

Data Engineering & Infrastructure

Collaborate with Data Engineers to structure and maintain the most valuable consumer health dataset in Europe ensuring data quality security and ethical use.

Architect scalable data pipelines necessary for model training feature engineering and inference at global scale.

Ensure the AI infrastructure is robust cost-efficient and supports rapid experimentation and deployment cycles.

Leadership & Collaboration

Act as the technical expert and mentor for junior AI/ML engineers as the team scales.

Work cross-functionally with Product Managers to translate user needs and business objectives into technical AI requirements and roadmaps.

Define and champion best practices for AI/ML development testing and deployment within the Engineering team.

What Youll Bring

Advanced AI/ML Expertise: 5 years experience designing building and deploying machine learning models into high-scale production environments ideally in a consumer-facing platform.

Recommendation Systems: Proven experience with building and optimizing personalized recommendation engines personalization systems or digital intelligence platforms.

Python & ML Frameworks: Expert proficiency in Python and major ML libraries (e.g. PyTorch TensorFlow Scikit-learn).

Data & MLOps: Strong understanding of data warehousing (e.g. Snowflake BigQuery) and experience implementing robust MLOps practices (e.g. Docker Kubernetes CI/CD for ML).

Product-Focused Delivery: Demonstrated ability to collaborate with product teams and rapidly iterate on AI features that deliver clear customer value.

Bonus Points If You Have

Experience working with multi-modal data sources (biomarkers genomics wearables surveys behavioral data).

Familiarity with health-tech regulated consumer data (e.g. GDPR HIPAA) or wellness data.

Experience with cloud platforms (e.g. AWS GCP Azure) for scalable AI infrastructure.

Background in research or application of Large Language Models (LLMs) or Generative AI.

Attributes Were Looking For

Technical Excellence: A strong hands-on engineer who is obsessed with model accuracy stability and production robustness.

Data-Driven Builder: Sees data as the core product and knows how to leverage it to create intelligent proprietary features.

Customer Obsessed: Focused on how AI can build clarity trust and transformation for users in their health journey.

Strategic Execution: Able to balance the need for quick feature delivery with building a long-term scalable AI architecture.

Relentless Drive: Thrives in high-growth mission-led environments and is motivated to define a new category.

Why Join Healf

Do your lifes best work: Build something that matters with a team that moves fast and aims high

Surround yourself with A talent: Youll work with high-performers who care deeply and raise the standard every day

Be a builder: This isnt a cog-in-the-machine role. Youll help shape our voice culture and growth

Wellbeing is the lifestyle: From office yoga to Healf Zone insights everything we do is rooted in our pillars: EAT MOVE MIND SLEEP

Premium Wellhub Membership: Unlimited entry to 1000s of gym yoga & fitness studios.

Exclusive Healf Perks: 50% off all Healf products plus discounted Healf Zone blood testing.

Nest Pension: Secure your future with our pension contributions.

Wellbeing-Focused Workspace: Incredible Hammersmith office with great natural lighting.

Team Connection: Annual company-wide retreat to recharge and bond.