AI Engineer Backend

About the Company

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.

Responsibilities

• Design and maintain robust, modular backend systems using clean architectural (SOLID) principles
• Own Cortex end-to-end: architecture, API design, service boundaries, and reliability targets
• Build platform services including automated audit/eval pipelines, patient simulators, and the retrieval layer
• Write fast, well-tested Python services using FastAPI, asyncio, and pydantic
• Wire up multi-agent orchestration, including routing, shared state, and tool interfaces
• Engineer RAG pipelines for high-signal retrieval (chunking, hybrid search, re-ranking)
• Implement observability via structured logs, OTEL tracing, and performance dashboards

Requirements

• Deep understanding of architectural design patterns (Clean/Hexagonal, DDD, SOLID, event-driven)
• At least 2 years of experience building or scaling user-facing AI software
• Expert proficiency in Python, FastAPI, asyncio, and pydantic
• Experience with production observability and agent patterns
• Previous startup experience

Preferred Qualifications

• Experience with real-time and voice technologies (WebRTC, LiveKit, SIP, VAD)
• Knowledge of programmatic prompt optimization and LLM-as-judge evaluation tooling
• Proficiency with GCP (Cloud Run, GKE, Vertex AI, Pub/Sub)
• Familiarity with healthcare data