Fullstack Engineer – AI
Hybrid – London
£70,000 – £80,000
Immersum are working with a medical-grade AI HealthTech company transforming clinical workflows across the UK. Their platform helps clinicians eliminate documentation burden through clinically safe and reliable AI systems already used in over 1 million consultations.
They’re hiring AI focused Full Stack Product Engineers to help build production grade AI systems used in high-stakes healthcare environments.
What you’ll do:
– Build and ship full-stack product features integrating deeply with LLMs in production
– Design systems resilient to hallucinations, output instability, and distribution shift
– Work closely with AI research teams to implement new architectures and model enhancements
– Contribute to AI output validation approaches, including multilingual clinical documentation quality
– Help maintain engineering quality, reliability, and safety standards in a regulated environment
– Work closely with product and design teams to deliver clinician-facing tools at scale
Tech stack:
React · TypeScript · Node.js/NestJS · Python/FastAPI · GCP · Kubernetes · Terraform · PostgreSQL · Redis · Pub/Sub · LLMs · AI Systems
Looking for:
– Strong full-stack engineering background with React + TypeScript
– Production experience building systems around LLMs – beyond simple API integration
– Deep understanding of failure modes in probabilistic systems
– Experience with output validation, fallback strategies, confidence thresholds, and human-in-the-loop workflows
– Familiarity with prompt engineering, RAG, fine tuning, or LLM evaluation frameworks
– Product minded engineers who enjoy ownership and shipping
Nice to have:
– Experience in clinical AI or other high-stakes AI domains
– Exposure to AI safety concepts in production
– Experience with internal AI evaluation or red-teaming exercises
– Familiarity with FHIR/HL7 integrations or event-driven architectures
Please note you must have full right to work for this position.
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