Senior Integrations Developer (Netsuite & Celigo) - (Contract), UK 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.

About the role (What you'll be doing)

You’ll be a hands-on integration engineer owning the build, maintenance, and evolution of fulfilment-critical integrations across NetSuite, Celigo, WMS platforms, and internal systems. This is an integration-heavy developer role with real business impact: when integrations are healthy, fulfilment runs smoothly; when they are not, you will be the person who can diagnose the failure and design a lasting fix. We are open to hiring at a higher level for the right person, given how business-critical this work is.

What you'll do:

• Own and improve integration flows connecting our proprietary platform, Celigo, NetSuite, and WMS systems.
• Build, test, and deploy integration changes with a focus on reliability, maintainability, and safe rollout.
• Develop and support NetSuite integration components, including RESTlets and, where appropriate, SuiteScript that improves integration robustness.
• Troubleshoot integration failures end-to-end (data issues, API behaviours, platform configuration, edge cases) and implement fixes that address root causes.
• Improve engineering quality across integrations: consistent patterns, clear documentation, and careful handling of retries, idempotency, and partial failures.
• Collaborate across time zones with a Systems team primarily based in Australia, aligning on priorities and communicating progress clearly in writing.
• Supporting core fulfilment data flows such as:
• Order-to-fulfilment status synchronisation.
• Inventory updates and reconciliation between NetSuite and WMS.
• Shipment confirmations and fulfilment updates across systems.

What good looks like in this role:

• Integrations are dependable, with fewer preventable failures and smoother fulfilment operations.
• When incidents happen, you isolate the cause quickly and restore service with minimal disruption.
• Integration work is easier to maintain over time because patterns are reusable and documentation is clear.
• Stakeholders trust changes because expectations are clear and releases are controlled.
• You move with urgency when it matters, without trading away quality.

About you (Who you are)

• You have deep, hands-on iPaaS integration experience (Celigo strongly preferred), and the ability to become productive in Celigo quickly.
• You have a strong understanding of APIs and endpoints, including real-world experience with authentication, payloads, error modes, and rate limits.
• You have strong working knowledge of NetSuite integrations, including RESTlets.
• You have a proven ability to debug integration issues end-to-end and implement fixes that prevent recurrence.
• You have built and supported multiple production-grade integrations and can point to examples of complex flows you owned (for example multi-system sync, robust error handling, retries, reconciliation, and clear recovery paths).
• Your mindset is a build-to-last mindset: you care about maintainable code and configuration, clear handoffs, and future-proof design.
• You are comfortable working in a fast-moving environment where priorities can evolve and ownership is expected.
• You ideally have SuiteScript experience, especially where it supports integration reliability.
• You have experience integrating with WMS platforms and fulfilment or inventory workflows.
• You are interested in building technology in regulated or healthcare-adjacent contexts.

Practicalities (UK)

This role is based in the UK and works closely with a Systems team largely based in Australia, so some collaboration may happen outside standard UK hours to maintain overlap. You can choose to be remote or hybrid in our Old Street office! We handle incidents during agreed support windows; we’ll align on expectations during the hiring process.

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.