About this role
Join our mission, join Doctolib!
We are looking for a Senior AI Engineer to join the Patient Health Platform team in Paris.
The Patient domain is at the heart of Doctolib's mission to help everyone be in better health. Our teams build the Health Companion that millions of people rely on every day - a seamless, AI-powered experience that empowers patients to take an active role in their own health journey.
Within the Patient domain, two streams drive this vision forward:
• Find Your Practitioner (FYP) focuses on making access to care faster, easier, and smarter. From our practitioner directory and online booking to intelligent care search assistance, FYP ensures that every patient can find the right professional at the right time.
• Preventive & Continuous Care Companion (P3C) goes beyond the consultation room. This stream builds the tools that help people prevent health issues before they arise, stay connected with their care team between appointments, and manage their health over time - through personalised health tracking, prevention campaigns, care plans, and AI-powered health guidance.
Together, these two streams shape a product that is not just a booking tool, but a true companion for health - recommended by practitioners and trusted by patients.
Your responsibilities include but are not limited to:
• Design and build the production search & recommendation architecture: full retrieval, ranking, reranking pipeline with standard and off-the-shelf components (vector search, semantic retrieval, LLM/managed rerankers).
• Establish strong baselines first (prompts, RAG, model selection) before reaching for custom ML.
• Build evaluation and observability into every stage, with offline and online evaluation.
• Set up the data/event feedback loops that drive iteration and feed deeper ML later.
• Improve search relevance and ranking on Patient facing products , raising result quality
• Own production quality: latency reliability, monitoring, and maintainability.
• Partner with ML Engineers and collaborate closely with PMs and SWEs to define, build, and ship AI-powered features that deliver measurable value to users and the business.
Who you are
Before you read on: if you don't have the exact profile described below, but you feel this job description matches your skill set, we still encourage you to apply.
You could be our next team mate if you have:
• Production deployment : ability to ship algorithms to production (ECS-based service on AWS)
• Strong analytical mindset: r esult-oriented, patient-first approach
• Significant experience as a Software or/and AI engineer shipping search or recommendation systems to production.
• Hands-on experience building end-to-end retrieval: ranking, reranking pipelines and familiar with nDCG, MAP, Recall@k, MRR
• AI-engineering proficiency : turning foundation models and off-the-shelf components into production systems: embeddings &