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 join:

- 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.

Values

- 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.

Reporting Line

Patricio, Co-Founder & CTO.

First 3 months

- Ship 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 6

- Cori'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.

Responsibilities

- 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.

Competencies

- 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

Recruitment process

- Screening with Patricio (Cofounder & CTO),

- Case study,

- Debrief with Cori engineers,

- Final interview with Emma (Chief Clinical Officer) and Jorn (Cofounder & CEO).

Compensation & benefits

- 90-95K (EU) + equity,

- Hybrid 3 days in-office / Barcelona,

- Health insurance,

- Lunch vouchers through Cobee.

📌 Senior AI Engineer - @Cori (España)
🏢 Breega
📍 España