Senior ML Engineer, AI & LLMs for Patient Care

Doctolib; Paris (TX); Hybrid; USD 122,000 - 167,000; Full time

Benefits offered by this job

Health insurance

25 days annual leave

Relocation support

Lunch vouchers

Job summary

Doctolib is seeking a Senior Machine Learning Engineer to join the ML Engineering team in Patient Solutions. You will design and deploy AI systems that transform patient care, from practitioner discovery to long-term care management, and scale AI capabilities across Europe.

You will lead retrieval pipelines, fine-tune LLM and VLM models, build agentic AI solutions, and define rigorous metrics with cross-functional partners.

Qualifications

• 7+ years of experience in Machine Learning, Deep Learning, or AI Engineering with production-scale impact.
• Strong experience in Information Retrieval and modern retrieval stacks (hybrid search, embeddings, vector databases).
• Proficiency in LLM/VLM development, distillation, MoE architectures, prompt engineering, and benchmarking.

Responsibilities

• Design and implement ML/AI solutions aligned with product goals (search, retrieval, care pathways).
• Build and maintain large-scale retrieval pipelines and multi-stage re-ranking.
• Develop, fine-tune, and evaluate LLM and VLM models (distillation, MoE, prompt engineering).
• Build agentic AI systems with external data integrations via tools and MCP integrations.
• Define metrics and run controlled experiments using W&B, MLFlow, or Braintrust; communicate results to product/engineering teams.
• Deploy production solutions with ML platform team; ensure reliability, observability, and performance at scale.

Skills

Machine Learning

Deep Learning

AI Engineering

Information Retrieval

Vector databases

RAG architectures

LLM development

VLM development

Prompt engineering

Production scaling

Tools

W&B

MLFlow

Braintrust

ADK

Kubernetes

Job description

Doctolib is seeking a Senior Machine Learning Engineer to join the ML Engineering team in Patient Solutions. You will design and deploy AI systems that transform patient care, from practitioner discovery to long-term care management, and scale AI capabilities across Europe.

You will lead retrieval pipelines, fine-tune LLM and VLM models, build agentic AI solutions, and define rigorous metrics with cross-functional partners.