Quadrivia is the health technology company behind Q, a comprehensive, controllable, and customizable assistant AI built by clinicians, for clinicians. Addressing the urgent shortage of healthcare professionals, Q provides real‑time, personal, and reliable support for clinical tasks across the care continuum. Designed for providers, payers, and pharmaceutical companies, Q is easy to customize and integrates seamlessly into workflows, delivering precise assistance across the care spectrum.
The Role You’ll build and run Cortex, the core AI architecture behind Q, and the services that sit on top of it: automated AI audits, patient simulators, retrieval (RAG), and the escalation agents that take over in red‑guardrail situations. This is a backend role first. You own the software underneath the agents.
Design and maintain robust, modular backend systems using clean architectural (SOLID) principles to ensure long‑term maintainability, scalability and flexibility as the agentic stack evolves.
Build the platform services around it: the automated audit and eval pipeline,



patient simulators for testing agents at scale, and the retrieval layer.
Write fast, well‑tested Python services with FastAPI, asyncio, and pydantic, and get the queues, caching, and data stores right.
Engineer the RAG pipeline for high‑signal retrieval (chunking, hybrid search, re‑ranking, caching) and prove the grounding holds.
Your core is backend and software engineering. At least 2 years, demonstrable, building or scaling user‑facing AI software that real users touched. We’ll want to see it.
Expert Python, with strong FastAPI, asyncio, pydantic, and production observability.
GCP: Cloud Run or GKE, Pub/Sub, Vertex AI, GCS, Secret Manager, Cloud Logging and Trace.
Healthcare data familiarity.
Build a patient simulator that lets us stress‑test agents at scale before they ever reach a real call.
Improve the RAG pipeline with hybrid retrieval and re‑ranking, then prove the gains with faithfulness and context

📌 Backend Developer Remote (España)
🏢 Quadrivia AI
📍 España