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Staff Engineer, Backend

Citizen Health

$200,000 - $235,000
Oct 31, 2025
San Francisco, CA, US • San Mateo, CA, US
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Citizen Health is looking to solve the problem of improving patient care and outcomes by building a personalized AI advocate. This advocate will leverage patient medical histories and data from other patients to generate insights for clinical decisions and daily challenges, particularly in rare and complex conditions. The company also aims to accelerate drug development by providing biopharma and researchers with seamless access to patients and regulatory-grade data.

Requirements

  • 7+ years of experience in backend development, with a focus on building scalable, distributed systems
  • Strong proficiency in one or more modern programming languages (e.g., Node.js, Java, Python)
  • Experience with healthcare interoperability standards, particularly FHIR
  • Strong understanding of RESTful API design and microservices architectures
  • Experience with cloud platforms (preferably AWS) and containerization technologies (e.g., Docker, Kubernetes)
  • Proficiency in working with both relational and NoSQL databases
  • Hands-on experience integrating and optimizing Large Language Models (LLMs) in production environments

Responsibilities

  • Architect and implement high-performance, scalable backend solutions using modern technologies, healthcare interoperability standards like FHIR, and advanced AI/ML technologies
  • Lead the design and development of RESTful APIs and microservices that support our patient, partner, and internal-facing applications
  • Integrate and optimize AI models, particularly Large Language Models (LLMs), using frameworks like LangChain and LlamaIndex
  • Implement Retrieval-Augmented Generation (RAG) systems to enhance the accuracy and relevance of AI-generated insights in the healthcare context
  • Design and implement efficient data pipelines to support AI model training and inference
  • Optimize data processing and storage solutions to handle large volumes of complex health data efficiently
  • Collaborate with data scientists and researchers to implement advanced analytics and AI models that derive insights from patient data

Other

  • You are a passionate builder and problem solver who thrives in dynamic, fast-moving environments.
  • You value collaboration but are comfortable taking ownership and working independently.
  • You approach complex problems with creativity and empathy, always keeping the needs of patients and users front and center.
  • You enjoy working at the intersection of technology and healthcare and are excited about making a meaningful difference in people’s lives.
  • Competitive salary + equity package