Staff ML Engineer, Retrieval & Medical Knowledge Platform

Doctolib; Paris; Hybride; EUR 120 000 - 170 000; Plein temps

Avantages offerts par ce poste

Health insurance

25 days vacation

Mental health support

Remote work days

Lunch vouchers

Transport subsidy

Relocation support

DoctoGrowth plan

AI training tools

Résumé du poste

Doctolib is seeking a Staff Machine Learning Engineer - Retrieval to join our AI team working on Clinical decision support and Medical Knowledge. You will ground clinical AI decisions in HAS guidelines, learned society recommendations, and peer-reviewed clinical studies, contributing to Doctolib's Medical Knowledge Platform that services health professionals and patients across Europe.

You will design and maintain indexing pipelines and retrieval systems, operate at scale, and build advanced

Qualifications

• Proven production experience building and scaling search & retrieval systems.
• Deep dual expertise in offline indexing and online retrieval; full pipeline ownership.
• Hands-on with the retrieval tech stack: Elasticsearch, Solr, Vertex AI, vector search, embeddings, re-ranking.
• Experience at Senior or Staff level with autonomy and depth.

Responsabilités

• Build and own Doctolib's Medical Knowledge Platform, grounding clinical AI decisions in validated medical sources (HAS guidelines, learned society recommendations, clinical studies)
• Design and maintain indexing pipelines and retrieval systems, ensuring end-to-end ownership across the full retrieval stack
• Operate at scale: architect and optimize systems handling 100M+ documents, 50+ req/s, and sub-300ms latency requirements
• Build custom re-rankers, optimize query processing pipelines, and design robust retrieval evaluation frameworks
• Engineer deep RAG systems from the ground up - going well beyond off-the-shelf components to tackle real medical knowledge complexity
• Work across the full retrieval stack: vector embeddings, vector search, re-ranking and rewriting queries

Connaissances

Search & retrieval

Elasticsearch

Vector search

Embeddings

RAG systems

Senior level

Outils

Elasticsearch

Solr

Vertex AI

Description du poste

Doctolib is seeking a Staff Machine Learning Engineer - Retrieval to join our AI team working on Clinical decision support and Medical Knowledge. You will ground clinical AI decisions in HAS guidelines, learned society recommendations, and peer-reviewed clinical studies, contributing to Doctolib's Medical Knowledge Platform that services health professionals and patients across Europe.

You will design and maintain indexing pipelines and retrieval systems, operate at scale, and build advanced