Senior AI Engineer I at BillionToOne in Menlo Park, CA

Summary: BillionToOne is a next-generation molecular diagnostics company on a mission to make powerful, accurate diagnostic tests accessible to everyone. They are seeking a highly motivated Senior AI Engineer I to support the design and implementation of AI and automation solutions that optimize operations across their commercial, billing, and customer experience teams. Responsibilities: - Build and deploy LLM-powered applications (retrieval systems, AI agents, workflow automation, vector storage) that integrate with internal systems and data sources - Partner with business stakeholders to identify automation opportunities, scope requirements, and define success metrics - Build lightweight data pipelines and analytics to support AI applications and measure their impact - Own projects end-to-end: from prototyping and iteration through production deployment and monitoring - Establish best practices for prompt engineering, evaluation, and responsible AI use as the team scales - Develop and lead internal training sessions on LLM fundamentals, prompt engineering, and AI-assisted development tools Required Qualifications: - 5+ years of experience in software engineering, data science, or ML engineering - Hands-on experience building applications with LLM APIs (OpenAI, Anthropic, etc.) - Strong Python proficiency and comfort with SQL and relational databases - Experience deploying and maintaining production systems - Familiarity with AWS - Excellent communication skills and ability to translate business problems into technical solutions - Self-directed and comfortable with ambiguity in a 0-to-1 environment Preferred Qualifications: - Previous entrepreneurial experience - Experience with retrieval architectures, vector databases, and embedding models - Familiarity with agent frameworks or workflow orchestration tools - Experience with traditional ML frameworks (scikit-learn, PyTorch, TensorFlow) - Prior work in healthcare, biotech, or other regulated industries Required Skills: LLM APIs, Python, SQL Important Skills: AWS, Data science Nice-to-Have Skills: Self-directed, Entrepreneurial experience, Healthcare experience Benefits: Multiple medical benefit options; employee premiums paid 100% of select plans, dependents covered up to 80%, Extremely generous Family Bonding Leave for new parents (16 weeks, paid at 100%), Retirement savings program including a 4% Company match, Increase paid time off with increased tenure, Daily on-site lunches provided from top eateries, A variety of perks on campus (state of the art gym, restaurant), Free on-site EV charging (compatible with all EVs, including Tesla)