Senior Frontend Engineer - Growth Experimentation in London

About Eucalyptus

We’re on a mission to make good health last a lifetime. More than 1 billion people live with obesity worldwide, driving preventable chronic conditions. We’re here to build better long‑term care.

Eucalyptus is now part of Hims & Hers, the global leader in personalised health and wellness. Euc is the company behind Juniper, one of the world’s largest weight‑management programs combining GLP‑1 medication with personalised nutrition, movement support, and clinician‑led care from prescribers, nurses, health coaches, pharmacists, and dietitians. Our published clinical research shows that our combined clinical and behavioural approach helps patients lose significantly more weight during their treatment with Juniper by four times.

Our Growth Story:

• 130% YoY revenue growth and a 90% reduction in cash burn – culminating in our $1.15bn acquisition by Hims & Hers in 2026, giving us the platform to take long‑term care global
• Supported over 350k patients living with obesity across our 5 markets
• Received selective NICE endorsement to provide services to the NHS
• Tailored our offering to thousands of patients in Australia, the UK, Germany, Japan and Canada

Own our Frontend Web, run growth experiments, and shape product impact. At Eucalyptus, we’re on a mission to make healthcare simpler, safer, and more accessible. Patients face friction when navigating care, and the Growth squad focuses on building frontend web experiences that directly move key metrics—retention, engagement, and conversions—while shaping the overall patient experience.

One of the key initiatives you’ll contribute to is experimentation across the frontend platform, designing and testing features that influence how patients engage with our services. This is a chance to drive measurable impact and shape best practices for the platform used across the business.

Our stack: React, React Native, GraphQL Federation, Go, TypeScript, gRPC, Pub/Sub, Kubernetes, GCP.

The impact you will have:

• Take ownership of the frontend web platform, ensuring scalable, polished, high‑performance experiences
• Design and deliver growth‑focused experiments that improve retention, engagement, and conversions
• Collaborate closely with product and marketing to translate insights into actionable features
• Influence frontend best practices across the team and mentor teammates

Who succeeds here:

You’ll likely succeed if you:

• Have strong React & TypeScript experience, with full ownership of web products
• Are experienced working on frontend platforms or product‑facing web apps
• Have a commercial mindset, understanding how features and experiments impact business metrics
• Thrive in autonomous, senior‑level roles, able to take ownership end‑to‑end

You don’t need to tick every box — if this role excites you, we’d still love to hear from you.

Nice to haves:

• Growth‑focused engineering experience
• Experience with GraphQL

This is a senior, high‑autonomy role where engineers get to own the frontend experience, define best practices, and directly influence growth metrics. You’ll work in a team that values experimentation, collaboration, and measurable impact, shaping features that truly move the needle for patients and the business.

If driving growth through product engineering and shaping high‑impact patient experiences sounds exciting, we’d love to hear from you.

At Eucalyptus, we value individuals from all backgrounds, experiences, and perspectives, and we embrace the unique qualities each person brings. When you apply, please let us know of any reasonable adjustments you may need during the interview process. We use AI‑assisted tools across our business to help our teams work more efficiently, including within our recruitment process. These tools support our team — all hiring decisions are made by real people, and every application is reviewed by a member of our recruitment team.