Senior Fullstack React Engineer

We have an exciting opportunity for a Senior Fullstack React  Engineer to join our Product & Tech team on a full-time, permanent basis in Bristol. If you're a self-starter with a keen interest in software development and enjoy collaborating in a team setting, we want to hear from you.

You’ll be a senior engineer on our B2C team, building Health Hero’s direct-to-consumer digital clinic, where patients access adult ADHD assessment, diagnosis and ongoing treatment, and a clinician-led weight-management service with medication delivered to their door. You’ll own features end-to-end: from accessible, beautifully-crafted React user journeys through to the server-side integrations that connect commerce, payments, clinical systems and pharmacy fulfilment. Your work directly shapes how thousands of patients experience life-changing care, from the very first click.

• Build patient-facing features end-to-end across our Next.js frontend and server-side BFF layer - onboarding and eligibility journeys, subscription checkout, condition management, medication reordering and patient records
• Ownintegrations with the services behind the app:
  Medusa commerce, Stripe subscription billing, Health Hero’s clinical platform APIs, our questionnaire/triage engine, pharmacy services and Sanity CMS
• Leadthe technical design of new services and markets - the platform is multi-tenant and white-label (UK, Ireland, Germany and retail partners), with feature-flagged rollouts and full internationalisation
• Craft accessible, responsive UI in our shared component library (Radix primitives + Tailwind), keeping quality and consistency high across every patient touchpoint
• Champion engineering quality - unit and component tests with Vitest, end-to-end and accessibility tests with Playwright, thoughtful code review and green pipelines in Git Lab CI
• Improve reliability, performance and conversion - using Datadog RUM, Open Telemetry tracing and analytics to find and fix what matters most to patients and the business
• Mentor other engineers and raise the bar through pairing, review and knowledge sharing
• Collaborate closely with product, design and clinical colleagues to turn regulated healthcare requirements into simple, humane user experiences

• 5+ years building production web applications, with deep expertise in React and TypeScriptand substantial
  
  Next.jsexperience (App Router, server components and server actions ideally)
• Genuinely fullstack: comfortable designing and consuming REST APIs, building backend-for-frontend layers, and working with authentication flows (OAuth/OIDC) and session management
• Experience with payments and subscriptions
  - Stripe or a comparable provider - including checkout, billing lifecycle and failure handling
• A strong testing habit: unit/component testing (Vitest or Jest + Testing Library) and end-to-end testing (Playwright or Cypress)
• Modern CSS and component-driven UI development (Tailwind, Radix/shadcn or similar), with a real commitment to accessibility
• Fluency with CI/CD pipelines and collaborative Git workflows (we use Git Lab), and monorepo tooling (pnpm work spaces, Turborepo)

• Headless commerce (Medusa, commerce tools, Shopify) or headless CMS (Sanity, Contentful) experience.
• Internationalisation and multi-tenant / white-label product experience.
• Observability tooling (Datadog, Open Telemetry) and feature-flag-driven delivery (Unleash, Launch Darkly).
• Experience in healthtech or another regulated domain, or building direct-to-consumer e-commerce journeys.

We exist to simplify healthcare and improve lives by making care feel instant, intelligent and…