Senior Full-Stack Software Engineer in London

ABOUT US

At Heim, we are reinventing how healthcare is delivered. We believe that healthcare is best delivered in the home of patients, and that we are at the cusp of a systemic shift away from hospital based care. Our mission is to expand access to in-person clinical care at home by empowering community nurses with technology that makes care delivery more efficient. We have created an AI native ecosystem that optimises the complex scheduling involved in delivering community based care, and are on track to automate every non clinical touchpoint for nurses. To date, our technology has powered our network of 400+ practitioners to deliver c. 30K appointments, and we have shown that our algorithms bring down the cost of at-home visits by c.35% whilst freeing up valuable time for care in doing so. We are growing fast and our ambitions are big – with new international markets on the roadmap, and strong investor backing. Our aim is to create the most productive, AI-enabled distributed clinical workforce working at the intersection of public and private health. By joining Heim, you will play a pivotal role in building the infrastructure that puts clinical care in the home.

WHAT IT'S LIKE TO WORK AT HEIM

• Meaningful problems – we build systems that improve how organisations understand and care for people. The work is complex, applied, and grounded in real-world patient impact.
• High standards, low ego – you’ll work alongside thoughtful engineers, clinicians, and operators who care about clarity and good judgement.
• Speed with intent – we move quickly but deliberately. Clear ownership, evidence-based decisions, outcomes over output.
• Simple, elegant solutions – we have a strong bias towards code that is easy to reason about, hard to break, and built to outlast the sprint it was born in.
• Direct access to founders – you’ll have visibility into and input on the direction of the company.

WHAT MAKES THIS ROLE DIFFERENT

This is a full-stack TypeScript role in the truest sense – you will own problems across the entire system, from UI to infrastructure. AI isn’t a feature here; it’s a first principle. We expect you to use agentic coding tools fluently (e.g. Claude Code, Cursor) and to be building your own views on where agentic workflows can meaningfully improve what we ship. You’ll be working on systems where the stakes are real: scheduling errors affect patient care, data quality issues affect clinical decisions, and downtime has consequences. That context sharpens every technical choice you make.

WHAT YOU'LL DO

• Design and build product features end-to-end across the Heim tech stack – owning them from first principles to production.
• Architect and implement AI-powered workflows: scheduling optimisation, practitioner dispatch, clinical data enrichment, and agentic referral automations that reduce manual touchpoints for nurses.
• Own the full lifecycle of features – from TypeScript frontend through to backend services, infrastructure, deployment pipelines, and testing – without relying on separate DevOps or QA teams to close the loop.
• Build and maintain the APIs, services, and data models that underpin clinical operations – with the reliability and auditability a regulated environment demands.
• Collaborate with our product and clinical ops teams to translate ambiguous real-world problems into working software.
• Make pragmatic trade-offs between speed and quality, and advocate clearly when the trade-off isn’t acceptable.
• Contribute to the architecture and infrastructure decisions that will shape the platform as we scale to NHS Trusts across the UK and into new markets.
• Leave the codebase better than you found it – improving performance, clarity, and resilience as part of everyday delivery.

You won’t get perfectly specified tickets. You’ll be trusted to think, decide, and ship.

HOW WE WORK

• Small team, fast loops, few layers – your decisions land fast and the feedback is real.
• We operate a hybrid team set up, and value high quality in person time so you must be able to commute to our central London office.
• Technical judgement is respected and expected – you’ll have a real voice in architectural decisions.
• Disagreement is normal. Good ideas win, not hierarchical ones.
• Strong bias toward execution: fewer meetings, clear ownership, and decisions grounded in evidence.

WHO THIS IS FOR

You’re a senior full-stack engineer who acts like a founder. You take responsibility for outcomes, not just tasks. You’re comfortable roaming an unfamiliar part of the codebase when something needs fixing, and you’ll ask sharp clarifying questions before committing to an approach. You probably have:

• 6+ years building and owning production software in fast-moving environments.
• Genuine full-stack capability – you’re not “mostly frontend” or “mostly backend”; you care about and can own the whole system.
• Proven ability to own the full delivery lifecycle: frontend, backend, infrastructure, CI/CD pipelines, deployment, and testing – without handing off to separate DevOps or QA teams.
• Active, fluent use of AI coding tools – Claude Code, Cursor, Copilot – not as novelty, but as default workflow.
• Experience making data-sensitive engineering decisions: you instinctively ask about PII classification, schema flexibility, and audit requirements before you build.
• A track record of shipping under ambiguity – you’ve taken a vague ask, formed a point of view, and delivered something that worked.
• The judgement to know when to move fast and when to slow down.

Bonus if you have:

• Experience in regulated environments (healthcare, fintech, legal) and an understanding of what “good enough” looks like when data sensitivity is high.
• Background building agentic or multi-step AI workflows in production.
• A side project or personal tool built with AI – something that shows you’ve been hands‑on with Cursor, Claude Code, or AI integrations outside of work.
• Familiarity with NHS data standards, FHIR, or community care systems.
• Infrastructure and cloud experience (GCP or equivalent) beyond the basics.