Company Overview
Cheiron is a Stanford-founded AI company building an AI-native operating system for the pharma, biotech, and broader life sciences industry.
Since launching in 2024, we've rapidly grown our general user base. In Korea, we reached 22% of industry users within six months and are now used across 200+ pharma and biotech companies as we continue to scale quickly.
We’re looking for a Backend Engineer, Applied Agents to help build Cheiron's agent layer and the backend systems that power it.
We're looking for a hands‑on builder who can quickly structure ambiguous problems and turn them into highly polished products. Design and build backend services and APIs on Python, FastAPI, and Postgres
Design and operate vector DB, semantic search, and RAG systems, and tune search quality and latency
Build large‑scale ingestion, cleaning, and indexing pipelines for life sciences data, including academic papers, clinical, regulatory, safety, and patent sources
Build systems that ground AI‑generated outputs in source data with traceable,



verifiable citations so they can be trusted in real pharma and biotech work
2+ years of experience shipping and operating production backend systems end to end
~ Strong backend engineering fundamentals: a deep understanding of API design, data modeling, databases, and system reliability
~ Active use of AI coding tools such as Claude Code and Cursor

Familiarity with life sciences domain data such as academic literature, clinical trials, regulatory documents, and patents
~ Experience deploying and operating production systems on AWS, Terraform, and Kubernetes, with a focus on reliability and observability
~ Experience at a seed or early‑stage startup

401(K) retirement plan
~ Health insurances (Medical/Dental/Vision)
~ Transportation support for early starts and late nights
~ In‑office snack bar and additional commuting and work travel support

📌 Backend Engineer, Applied Agents (Los Altos)
🏢 Cheiron
📍 Los Altos