data
Posted Apr 8AI engineer
at Lucis
Paris, FranceRemote
Requirements
- THE ROLE We're building AI agents that act as a doctor for preventive health — analyzing 110+ biomarkers, reasoning over clinical data, and delivering protocols that change how people age. The system works.
- As our AI Engineer, you own the reasoning engine: the agents, the retrieval pipelines, the clinical workflows, and the infrastructure that makes it all reliable in production.
- The gap between a great LLM demo and a trustworthy AI doctor is enormous — your job is to close it.
- You could be responsible for - AI agent architecture — design and ship the multi-agent system behind our AI doctor: reasoning, planning, tool use, clinical citation, and safe fallback behavior - Retrieval & knowledge — vector infrastructure, embedding pipelines, RAG architecture over clinical literature and user health data.
- You don't need to be a doctor, but you need to earn their trust ABOUT YOU You’re passionate about the future of human health and want your work to help people stay healthy for longer.
- experience building and shipping software and ML systems in production - You've shipped AI agents in production recently — not as a side project, as the core product - You think in systems: prompts, retrieval, tool orchestration, evals, and failure modes are all part of the same design problem - You're hands-on with vector databases, retrieval pipelines, and LLM endpoints — Python-native, comfortable in LangChain or equivalent - You write evals before you ship, because you know that vibes-based QA doesn't
- Our current stack Python repo and TS monorepo (platform) PostgreSQL + Prisma AWS (Terraform) GitHub Actions
- Claude Code + Cursor
- AI/agent framework: mostly Langchain ecosystem THE PROCESS - Intro call (20 min): culture & role fit. - Technical interview (30 min) - At-home case study: hands-on project, delivery in 2 days. - Deep dive (90 min) and team chat (on-site) - Reference calls HOW WE WORK We work together from our Paris hub.
- At Lucis, AI isn't just our product, it's our engine. 100% of our teams are equipped with the best AI agents.
- You have carte blanche to explore and automate everything that can be, so you can focus exclusively on high-value work.
Experience
- You’ll fit in well if - You have 8+ years'
Contact
- Making preventive health the default for every human in Europe The mission At Lucis https://lucis.life/?utm_source=career_job_desc&utm_medium=content, we believe healthcare should be preventive, not reactive.
- You can read more about who we are and how we work here https://lucis.life/careers?utm_source=career_job_desc&utm_medium=content.
Additional details
- We’re building the OS for human longevity to help people add more healthy years to their lives.
- Now we need to make it smarter, faster, and ready for millions of users.
- You work directly with our medical team to translate clinical knowledge into systems that actually behave like they understand it.
- You know the difference between retrieval that works and retrieval that a clinician would trust - Data pipelines — ingestion and normalization from labs (Eurofins, Randox), wearables, and third-party partners.
- Clean data in, reliable inference out - Production reliability — LLM endpoints that reason correctly at scale, with observability, evals, and failure modes you've thought through before they happen - Medical collaboration — translate complex clinical
- requirements into agent workflows, working side by side with our medical advisors.
- You move quickly from idea to execution, take full ownership of what you build, and work best with talented people who care as much as you do.
- You thrive in fast‑moving environments, learn by doing, and value feedback as a way to continuously improve.
- - You prefer strategic advisory work over hands-on execution.
- - You've only worked in large, well-established companies.