Full Stack Engineer

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.

Shape Juniper and our expanding product ecosystem with fullstack impact

The Shop/Ecosystem squad is focused on expanding Juniper into new product lines and areas of care, helping patients discover the right products and services at the right time. One of the squad’s most exciting initiatives will be a recommendations tool, working in close collaboration with Data Science, to shape how patients interact with Juniper and other product lines across web and mobile.

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

The impact you will have

• Build fullstack features using React + Go/Node.js for Juniper and new product lines, shaping how these features work across web and mobile

• Collaborate with cross-functional teams, including Data Science, to design product-facing solutions and make decisions on trade-offs and integration

• Implement scalable, maintainable solutions across frontend and backend, including features for the mobile app

• Contribute to engineering best practices and help mentor other squad members

• Partner with product, design, and other teams to prioritize what drives real impact

Who succeeds here

You’ll likely succeed if you:

• Have strong React or frontend framework skills

• Are experienced with backend development in Go, Node.js, or other languages

• Have experience with distributed systems and a balanced fullstack skillset

• Thrive in fast-paced, iterative environments

• Can work on complex systems and collaborate effectively across multiple teams

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

Nice to haves

• Experience with React Native and mobile app development

This is a senior, high-autonomy role where engineers get to own the lifecycle of features from design through delivery, working in a team that values experimentation, collaboration, and delivering real impact for patients. You’ll have the chance to work on Juniper and its expanding ecosystem, helping define engineering practices that will scale as the company grows.

If shaping the future of digital healthcare and influencing high-impact product experiences sounds exciting, we’d love to hear from you.

Why join Eucalyptus?

Euc is also behind a growing family of digital healthcare clinics (Pilot, Kin, Software, Compound) across men’s health and well-being, fertility, skincare, and preventative health.

Here’s what makes joining Euc unique:

• What’s next - Our goal for the next three years is to support 1 million patients globally to live better for longer. We’re launching into new conditions, demographics, and geographies as we build a truly preventive healthcare ecosystem.
• Build something world-changing - We’re on the path to becoming the world’s largest international digital healthcare company. It will be challenging, fast-paced, and deeply rewarding.
• Make real impact - You will deliver work that directly shapes patient outcomes and scales evidence-based care across markets.
• Accelerate your growth - You will have high ownership, continuous feedback, and dedicated development support.
• Join a motivated team - You will collaborate with talented peers to solve complex clinical and operational problems at scale.

What’s ahead in the UK

• Be an owner – Your own stake in the business with our employee options program
• Invest in your growth – Annual development budget plus 3 days of professional development leave
• Work flexibly – Hybrid setup with 3 days a week in our Old Street office, designed for focus and collaboration
• Support your well-being – Private health insurance through Vitality or opt for a monthly wellness allowance to spend on what matters most to you
• Take time off – 25 days of holiday, enhanced parental leave and work from anywhere 3 weeks out of the year
• Join a connected team – A vibrant office culture with regular socials, clubs, after-school sport, and seasonal events

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.