Senior Full - stack Engineer

Build the Future of Wellbeing

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.

The Role

We're looking for a senior full-stack engineer with a strong front-end focus to own the development of our personalisation product — a healthtech platform set to revolutionise wellbeing.

You'll be part of a lean, collaborative team where engineers have real ownership, shaping both the customer experience and the technical direction. This is a role for someone who craves the pace and intensity of a high-growth startup — shipping fast, adapting constantly, and thriving on impact.

• Deliver pixel-perfect, production-ready UI using Next.js, React, TypeScript, and Tailwind CSS

• Translate Figma designs into reusable, accessible, WCAG-compliant components and maintain a shared design system

• Partner with AI engineers to build robust RAG / LLM-augmented pipelines

• Implement modern data-fetching strategies (Server Actions, App Router, React Query/SWR) that balance SEO, performance, and scalability

• Write and maintain automated tests (unit, integration, end-to-end) and strengthen our CI/CD pipelines

• Work across the stack when needed (API routes, server-side logic, lightweight data modelling)

• Collaborate closely with design, product, and backend teams to ship quickly and with care

• Define and uphold engineering best practices around software testing, code quality, and CI/CD standards

• Set technical direction and guide other engineers in the team through code reviews, mentorship, and pair programming

• Establish scalable development workflows that promote reliability, maintainability, and collaboration across front-end and back-end teams

• Partner with leadership and cross-functional teams to continuously improve engineering processes and delivery speed

What You'll Bring

Mindset & Approach

• First-principles thinking: You strip problems down to fundamentals and design elegant, scalable solutions

• Systems mindset: You think in architectures, spotting how pieces fit and scale

• Relentless execution: You move fast and consistently ship high-quality code

• Pace appetite: You don't just tolerate startup speed; you crave it and thrive on intensity

• Product ownership: You care about the "why" as much as the "what," building experiences that transform personalised wellbeing

• Collaboration & leadership: You work tightly with design, product, and AI, while also guiding other engineers and setting technical direction when needed.

Technical Excellence

• Front-end experience: 3+ years building production React apps, including 1+ year with Next.js and headless commerce (Shopify preferred)

• Technical fluency: Strong command of TypeScript, modern React patterns (Hooks, Suspense, Server Components), and Tailwind CSS

• Performance & UX focus: Proven track record of caring about user flows and how performance shapes them

• Accessibility & inclusion: Experience with accessibility best practices and a genuine commitment to inclusive design

• Engineering quality: Hands-on with Git and code reviews, plus exposure to automated testing and CI/CD pipelines

Bonus Points If You Have

• Experience with PostHog or other product analytics tools.

• Deployment experience on Vercel or running Cloudflare Workers at the edge.

• Familiarity with A/B testing frameworks and experimentation workflows.

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.