Company Overview

In July ****, Cheiron announced an $8 million seed round led by Menlo Ventures, bringing total funding to $13 million to date, with the backing and strategic support of industry veterans including Moderna co-founder and MIT Institute Professor Robert Langer, former Pfizer Chief Medical Officer Freda Lewis-Hall, Chai Discovery co-founder and CEO Josh Meier, former Starbucks CEO Laxman Narasimhan, and former Apple AI chief John Giannandrea.

The company's platform helps biopharma teams represent, reason over, and stress-test the full state of a drug development program, including the claims, evidence, assumptions, risks, decisions, and commitments that determine whether a therapy advances.

In less than six months since launch, Cheiron has been adopted by tens of thousands of biopharma professionals and deployed by major drug developers, and is already used by 7 of Korea's top 10 biopharma companies.

Cheiron is expanding into pharmaceutical CMC (Chemistry, Manufacturing, and Controls) teams.

CMC governs how a drug is made, tested, and kept consistent across its entire commercial life.

Today it runs on documents, spreadsheets, and institutional memory.

The team includes leaders with combined decades of experience across pharma and biotech.

Headquartered in Los Altos, California.

We are building and deploying the product now with rapid expansion into integral markets.

We're looking for a Full Stack Engineer, Applied AI to help build Cheiron's core product and infrastructure.





This role spans the full stack — backend systems, AI workflows, RAG and search pipelines, APIs, and the customer-facing product itself.

on builder who can quickly structure ambiguous problems and turn them into highly polished products.

Design and build backend services on Python, FastAPI, and Postgres

Develop ingestion, indexing, and search pipelines for life sciences data, including academic papers, clinical, regulatory, safety, and patent sources

Build customer-facing features end to end, from the data model to the API to the React/TypeScript frontend

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 production software end to end

Strong backend engineering fundamentals and experience designing APIs, databases, and services

Full-stack range, comfortable working through the frontend with React and TypeScript

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 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

Cultural Interview

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📌 Programador Fullstack Backend O Frontend (Burgos)
🏢 Cheiron
📍 Burgos