Founding Engineer - Wellbeing Intelligence

Do Your Life’s Best Work

If modern wellbeing were redesigned from scratch, it wouldn’t live in a GP’s office or a cluttered supplement aisle. It would be digital-first, beautifully curated, and powered by data that actually helps you feel your best.

We’re building  ecommerce platform at the intersection of personalised health and curated wellbeing. We connect customers with the world’s most effective products across EAT, MOVE, MIND, and SLEEP, and we’re 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, we’re scaling fast, and redefining how the world shops and lives well.

At Healf, we’re not just a company, we’re 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 Standard—five 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 we’re 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 can’t be done.
• Obsession Over Talent:
  Talent alone isn’t enough—relentless curiosity and a drive to grow set us apart.
• The Healf Lifestyle:
  We live what we preach—our personal commitment to wellbeing fuels our professional productivity.
• Stronger Together:
  Everyone owns their lane, but we run as a unit.

Healf is one of the UK’s fastest-growing health platforms.

• £100M+ revenue run-rate
• 700k+ customers
• High-retention, high-margin marketplace
• Strong brand and distribution
• No legacy intelligence layer

We’ve built the marketplace.

Now we’re building the system that makes it intelligent.

Today, wellbeing decisions are primitive:

Customers guess.

They follow influencers.

They try products and hope.

We are building a personalised wellbeing intelligence engine that:

• Understands behavioural patterns to drive deep customer-level personalisation
• Captures user motivations and longitudinal health data from biomarker reports, wearables etc.
• Builds smart AI agents to help customers solve their different wellbeing needs using all the data captured from them.
• Builds a closed feedback loop by analysing outcomes and continuously improving our ML models.

If we get this right, we don’t just sell products. We become the decision engine for wellbeing.

This is 0→1 opportunity to build a net new business line within Healf which will drive up to 250M in annual revenue in the next 3 years.

To build this, you will lead experimentation and architect the solution from the ground up.

We are hiring a Founding Engineer to build this business line for Healf from scratch.

This is not joining an existing team. You will define the system that others will build on.

You will have real authority over architecture and technical direction. This role determines what is possible.

You will:

• Architect and build the full wellbeing intelligence stack and product platform
• Design infrastructure capable of learning from live user interaction
• Make core build vs buy decisions
• Define engineering principles across backend, data, and ML systems
• Partner directly with the CTO to drive technical strategy for the company
• Work cross-functionally with Product, Design and Data to shape and ship the Wellbeing Intelligence platform end-to-end
• Hire and mentor a strong, high-potential engineering talent team to scale wellbeing intelligence
• Be on top of new technology trends and using them to build next-generation products

Built or significantly shaped a system from zero-to-one - not just joined after product-market fit

Architected systems that later scaled to meaningful usage (100k+ MAU or equivalent production load)

Owned platform-level decisions with long-term consequences

Worked…