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GenAI Engineer – Retrieval-Augmented Generation (RAG)

Remote: 
Full Remote
Contract: 
Full time
Work from: 
United Kingdom

Offer summary

Qualifications:

Masters Degree in a relevant field., 3+ years of experience in machine learning or NLP roles, focusing on LLMs and GenAI., Strong proficiency in Python and deep learning frameworks like PyTorch or TensorFlow., Experience with healthcare data and compliance (HIPAA/GDPR)..

Key responsabilities:

  • Design and implement RAG architectures using various LLMs.
  • Build and maintain retrieval pipelines for health data.
  • Integrate RAG outputs into user-facing applications for reliable responses.
  • Collaborate with product and data science teams to enhance model performance.

all.health logo
all.health Health, Sport, Wellness & Fitness Startup https://all.health/
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Job description

all.health is at the forefront of revolutionizing healthcare for millions of patients worldwide. Combining more than 20 years of proprietary wearable technology with clinically relevant signals, all.health connects patients and physicians like never before with continuous, data-driven dialogue. This unique position of daily directed guidance stands to redefine primary care while helping people live happier, healthier, and longer.

Education
  • Masters Degree

    • About the Role
  • You will design, build, and optimize RAG pipelines that combine large language models (LLMs) with domain-specific retrieval systems, enabling natural language understanding and reasoning over patient data, clinical guidelines, and health records. Your work will directly impact how patients and clinicians interact with our platform, enabling safe, accurate, and context-aware content surfacing.

    • Responsibilities
  • Design and implement RAG architectures using open-source and potentially proprietary LLMs (e.g., LLaMA, Mistral, OpenAI, Anthropic).
  • Build and maintain retrieval pipelines over structured and unstructured health data (EHRs, patient notes, device logs, clinical documentation).
  • Develop indexing strategies using vector databases (e.g., FAISS, Weaviate, Pinecone) and embedding models (e.g., BioBERT, ClinicalBERT).
  • Integrate RAG outputs into user-facing applications, ensuring responses are grounded, reliable, and privacy-compliant.
  • Work closely with product, clinical, and data science teams to fine-tune prompts, evaluate responses, and iterate on model performance.
  • Build evaluation pipelines for factuality, relevance, and safety using synthetic and real-world datasets.
  • Contribute to infrastructure for scalable GenAI deployments and model versioning.
  • Stay up to date with the latest research in GenAI and health tech applications of LLMs.

    • Requirements
  • 3+ years of experience working in machine learning / NLP roles, with recent focus on LLMs and/or GenAI.
  • Strong proficiency in Python, deep learning frameworks (PyTorch or TensorFlow), and GenAI libraries (LangChain, LlamaIndex, Transformers).
  • Hands-on experience with vector search, embedding models, and retrieval pipelines.
  • Familiarity with prompt engineering, prompt tuning, and evaluation of generative model outputs.
  • Experience working with healthcare or sensitive data (HIPAA/GDPR compliance awareness).
  • Strong problem-solving skills and ability to move fast in a startup environment.
  • Bonus: Experience with MLOps, Kubernetes, AWS/GCP, and deploying models in production.
    •

    Required profile

    Experience

    Industry :
    Health, Sport, Wellness & Fitness
    Spoken language(s):
    English
    Check out the description to know which languages are mandatory.

    Hard Skills

    Deep LearningMachine LearningPython (Programming Language)Natural Language Processing (NLP)Prompt EngineeringLarge Language ModelingVector DataEmbeddingModel ValidationgRPCAWS Cloud ServicesMLOps (Machine Learning Operations)Kubernetes

    Other Skills

    • Problem Solving
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