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.Why joinHelp 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.ValuesHigh agency,Curiosity,Creativity,Accountability,Transparency.Mission highlightsWe 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.Reporting LinePatricio, Co-Founder & CTO.First 3 monthsShip to production one agentic workflow live with real users, taking a multi-step trial process from chat to completed output,Define what "good" means for our AI systems and hold releases to it: accuracy, latency, cost, and failure modes, backed by an eval framework you designed,Own the AI architecture decisions: agent framework, evals, model and fine-tuning strategy, build vs buy.



You set the direction.By month 6Cori's AI roadmap is yours to shape alongside the founders,At least 2 additional workflows have been built and deployed to production,Cori's AI strategy (agents, harness, fine-tuning) is defined and the first pieces are in production.ResponsibilitiesOwn 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.Competencies5 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).StackPython, FastAPI, LangGraph, Postgres, Vector DBs, GCP/AWS, DockerRecruitment processScreening with Patricio (Cofounder & CTO),Case study,Debrief with Cori engineers,Final interview with Emma (Chief Clinical Officer) and Jorn (Cofounder & CEO).Compensation & benefits90-95K (EU) equity,Hybrid 3 days in-office / Barcelona,Health insurance,Lunch vouchers through Cobee.
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📌 Senior AI Engineer - @Cori (Barcelona)
🏢 Tamarind Intelligence
📍 Barcelona