Senior Fullstack Software Engineer - Ecosystem Experience
Job description
Senior fullstack engineer on Semble's Ecosystem Experience team, owning end-to-end design and delivery of integrations connecting the clinical system to labs, pharmacies, partner APIs, webhooks and the Semble Connect automation platform.
At a glance
- Employment
- Full-time · Employee (employment agreement)
- Work mode
- Remote
- Languages
- English – fluent
- Pay
- GBP 70,000 – 90,000 / year
What you'll do
- Lead the design and delivery of integrations that move clinical and operational data safely between Semble and external systems, including REST/GraphQL APIs, webhooks, HL7, SFTP, and iPaaS/automation flows
- Work across the stack in a Yarn/Nx TypeScript monorepo: React on the frontend, Node.js services and domain modules on the backend, GraphQL (internal and public APIs), and MongoDB
- Take ambiguous partner specs and product goals and turn them into clear technical designs, sequenced delivery plans, and clinically safe, testable solutions
- Make sound architectural trade-offs and document the decisions so others can follow them
- Own production outcomes: monitoring and alerting (e.g. Datadog), incident diagnosis, root-cause analysis, and durable fixes
- Improve reliability and operability: failure handling, retries, idempotency, credentials/secrets, multi-tenant config, and safe rollouts across many production environments
- Contribute to Semble Connect and related automation — provisioning, connections, recipe/webhook patterns, and the product surfaces that expose them to practices
- Set a high quality bar through design reviews, thorough code reviews, automated tests (unit, integration, e2e), and pragmatic CI/CD improvements
- Mentor and unstick teammates; give clear feedback; help more junior engineers grow without becoming a bottleneck
- Influence the Ecosystem Experience roadmap and technical standards — surfacing risks early, proposing better approaches, and aligning stakeholders when requirements conflict
What we're looking for
- 5+ years' professional experience building production web applications with React and TypeScript, including substantial time operating as a senior / staff-of-one on complex features
- Strong hands-on experience with Node.js backends and APIs (REST and/or GraphQL)
- Proven experience integrating with third-party systems — APIs, webhooks, auth flows, retries, idempotency, credentials/secrets
- Ability to design systems, not just implement tickets: break down large problems, define interfaces/contracts, and leave codebases easier to change than you found them
- Comfort working in ambiguity — clarifying requirements, challenging weak specs, and driving decisions when information is incomplete
- A production ownership mindset: debugging complex issues across services, reading logs/metrics traces, and preventing the same incident twice
- Solid automated testing habits (unit/integration/e2e) and comfort with CI/CD
- Experience with NoSQL databases (MongoDB or similar) and cloud-hosted applications (AWS preferred)
- Strong written and verbal communication — RFCs/tech notes, partner discussions, and clear updates for Product and other engineers
- Collaborative leadership without needing formal authority: mentoring, reviewing thoughtfully, and aligning people around a plan
- Security and privacy awareness appropriate for handling sensitive healthcare data — least privilege, secrets hygiene, safe logging
- Comfort using AI coding tools to accelerate delivery without lowering the quality bar
Nice to have
- Healthcare, HL7/FHIR, lab/pharmacy, or other regulated-domain integrations
- IPaaS / automation platforms (Workato or similar)
- Design systems / component libraries, and large monorepo experience
- Infrastructure as Code (Terraform / CDK), observability (Datadog or similar), and multi-tenant SaaS
- Experience leading technical delivery across multiple engineers or workstreams
- Playwright or Cypress e2e experience
- Bilingual English–French
Your team
Ecosystem Experience
The group that connects Semble to the wider healthcare ecosystem: labs, pharmacies, partner APIs, webhooks, and Semble Connect, our automation platform built on Workato. Works closely with Product, Business, and external partners, and ships in a large TypeScript monorepo used across the company.
Benefits
Comprehensive health & wellbeing support — including private health insurance, and mental health support and free therapy sessions through Oliva
Get the tech you need — latest MacBook (unless you prefer Windows) and a wide range of equipment to set up your home office ergonomically
Fantastic office space in Central London, right outside Monument — with a roof terrace, weekly activities, loads of natural light, and cute doggies
- £70,000–90,000 package, based on your experience and the value you can bring
- Autonomy and ownership
- 36 days off: 25 holidays + bank holidays + 3 extra days (birthday and 'feel good' days)
- Hybrid & flexible work environment — work from anywhere in the UK, with also some flexibility to work across Europe
- Work alongside an inspiring team — founders started Semble after a successful startup exit
- Barista coffee, tea, fruits, happy hours and activities
Apply
About Semble
Enabling health professionals to amplify their impact
Semble provides a cloud-based clinical system used by thousands of clinicians, making their lives easier and saving them money, while structuring their health data to help research.
Mission
Enable health professionals to amplify their impact by improving the way healthcare is delivered to millions of people through powerful, innovative, intuitive, and secure software.
Key facts
- Cloud-based clinical system used by thousands of clinicians
- Structures health data to help research
- Two founders started Semble after a successful startup exit
- Office space in Central London, right outside Monument
What they value
- Impact — We do work that matters
- Collaboration — We are in it together
- Human touch — We care deeply