Senior AI Engineer
About the role
We're seeking a hands-on Senior AI Engineer who can bridge the gap between data and biomedical expertise while delivering robust backend code. Reporting to the Head of Applied AI, your primary focus will be building the LLM-facing components of our backend service, while ensuring the AI models consistently produce accurate, grounded, useful, and reliable outputs under real-world load.
Responsibilities
Writing production-ready backend code for LLM-facing components of our backend service
Building automated evaluation systems for LLM-dependent code, including regression datasets, quality metrics, failure taxonomies, and release gates
Designing and validating LLM-based solutions (prompts, context-construction pipelines, tool-calling workflows, structured outputs, and retrieval systems) and proving their effectiveness with real data and meaningful metrics
Measuring and improving LLM solutions quality, grounding, consistency, latency, token usage, and cost
Requirements
Direct experience building, shipping and operating meaningful LLM-powered products or workflows in production
Scientific or quantitative background in machine learning, statistics, computer science, biology, chemistry, or a related field; experience in biotech, pharmaceuticals, or another life-sciences setting is preferred
Humble, hungry, and smart attitude
Clear technical judgment: able to explain trade-offs, prioritize high-value work, and stop low-ROI experimentation
Qualifications
History of working at early-stage, product-based startups
Experience developing software in regulated or high-accountability environments
Skills
Experience with natural language processing (NLP), machine learning, and deep learning frameworks such as TensorFlow, PyTorch, or Hugging Face Transformers
Benefits
The opportunity to work at a modern, cutting-edge healthcare technology company devoted to meaningful positive impact on human life.
Collaboration, velocity, and customer obsession are our baseline, demonstrations of craftsmanship and ROI are celebrated.
Pay
$175,000 - $215,000
Schedule
Hybrid in San Francisco with in-office days Tues/Wed/Thurs and flexibility to work remote Mon/Fri.