Senior AI Engineer - @Cori
3 days ago
Barcelona
• Curiosity, Patricio, Co-Founder & CTO. Cori Clinical is the operating system behind better clinical trials. Cori builds the best-in-class AI platform for the entire trial startup: research, design, authoring, review, and amendments, so the science never waits on the process. Founded in 2025 by Jorn Jansen Schoonhoven (CEO, ex-Amazon, ex-IBM) and Patricio Fernández Weisson (CTO, ex-AstraZeneca, ex-Sanofi), and backed by leading investors. • Help redefine how clinical trials are run using AI, in one of the most important industries in the world,, • Work alongside a small team of exceptional engineers, operators, and clinical experts solving genuinely hard problems,, • High freedom for research and testing, with lots of green fields for your ideas,, • Build systems that don't just automate workflows, they accelerate getting new treatments to patients faster,, • Work directly with leadership and founders., • High agency,, • Curiosity,, • Creativity,, • Accountability,, • Transparency. Mission highlights: We are building an AI-guided system that accelerates clinical trials to speeds never seen before. So any organization, large or small, can get medicine to patients faster. • Own AI-related technical decisions across the company and products,, • Design and build agent frameworks for complex, multi-step workflows,, • Go beyond RAG: tool use, structured outputs, multi-agent/multi-chain systems,, • Build eval and feedback loops (testing, scoring, iteration),, • Ship reliable, production-grade AI systems (accounting for latency, cost, and failure modes),, • Turn messy clinical processes into deterministic, auditable systems,, • Stay current with and experiment with SOTA technologies in the field., • 5+ years of backend engineering experience, including 1-2+ years building LLM-based systems in production,, • Strong Python backend engineer (FastAPI, infrastructure, data structures),, • Real, hands-on experience with LLMs in complex, agent-based workflows, not just API calls to a foundation model,, • Comfortable guiding decisions on LLM/SLM fine-tuning strategy,, • Track record shipping multi-step/agentic systems to production, not just prototypes,, • Experience with evals, observability, and system reliability practices,, • Solid ML/NLP fundamentals,, • Prior experience in a startup or fast-paced environment strongly preferred,, • Fully fluent in English (mandatory). Stack: Python, FastAPI, LangGraph, Postgres, Vector DBs, GCP/AWS, Docker • Screening with Patricio (Cofounder & CTO),, • Case study,, • Debrief with Cori engineers,, • Final interview with Emma (Chief Clinical Officer) and Jorn (Cofounder & CEO)., • 90-95K (EU) + equity,, • Hybrid 3 days in-office / Barcelona,, • Health insurance,, • Lunch vouchers through Cobee. #J-18808-Ljbffr