Founding Engineer - Wellbeing Intelligence
Job Overview
Build the Future of Wellbeing
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.
That’s what we’re building at Healf. An 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.
About Us
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.
With Healf Zone on the horizon, we’re 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 that’s not only extraordinary, but a first of its kind.
The Opportunity
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.
The Role
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
Who You Are
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 in high engineering bar environments where architectural judgment mattered
Built or integrated ML / data-driven systems in production
Built ML and LLM powered consumer experiences (not just experimentation)
Influenced technical direction beyond your immediate team
Skilled in building and improving products via continuous experimentation and iteration
Drove development velocity and quality across broader organisation
You’ve seen both phases: early ambiguity and later scale.
What Success Looks Like
Within 18–24 months:
A production-grade intelligence layer powering personalised decisioning
A scalable data architecture designed for international growth
A high-talent engineering nucleus built around you
Clear product differentiation driven by intelligence, not curation alone
The reality is this is hard.
It requires speed and precision.
It requires building for scale without overbuilding.
It requires balancing ambition with pragmatism.
But if you want to build something foundational, this is that opportunity.
Why Join Healf
Do your life’s best work: Build something that matters, with a team that moves fast and aims high
Surround yourself with A+ talent: You’ll work with high-performers who care deeply and raise the standard every day
Be a builder: This isn’t a cog-in-the-machine role. You’ll 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 1000's 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.