Principal ML Engineer: Cross‑Team AI & LLM Architect (Remote)

Doctolib; Paris; Hybrid; EUR 150,000 - 190,000; Full time

Benefits offered by this job

Health insurance

Vacation allowance

Mental health support

Relocation support

Lunch vouchers

Transport subsidy

Parent Care

Remote policy adaptation

AI tools access

Job summary

Doctolib is seeking a Principal Machine Learning Engineer to join the DS & AI organization in Paris. You will own cross-cutting technical challenges, shaping architecture decisions and standardizing ML evaluation across Clinical, Productivity, Phone Assistant, and ASR teams.

You will lead design efforts, drive production patterns, and mentor staff engineers while collaborating with Product, Legal, and Compliance to meet EU requirements. This role blends technical depth with strategic influence.

Qualifications

• 10+ years in ML/AI with 3+ years at Staff+ or Principal level leading multi-team technical initiatives.
• Expert in two or more: clinical NLP, LLM fine-tuning/evaluation, automatic speech recognition, RAG systems, or reinforcement learning.
• Proficient in Python, PyTorch/Transformers; track record deploying ML systems in production (AWS/GCP).
• PhD in Computer Science, AI, Statistics, or related field (or equivalent research experience).
• Exceptional communication skills and ability to align diverse stakeholders and explain complex decisions.

Responsibilities

• Own cross-team ML architecture decisions, from model selection to production deployment patterns.
• Define and drive adoption of rigorous evaluation frameworks across all AI teams.
• Establish shared production infrastructure patterns for AI: model and prompt versioning, guardrails, uncertainty quantification, cost optimization, and observability.
• Lead the technical design of agentic solutions and enable product teams across Doctolib to build on AI capabilities.
• Elevate technical standards across the DS & AI org by guiding Staff and Senior ML Engineers.

Skills

ML/AI leadership

Python

PyTorch/Transformers

vLLM inference

LLM fine-tuning

Strong communication

Education

PhD in CS/AI/Statistics

Tools

AWS

GCP

ML infra deployment

Job description

Doctolib is seeking a Principal Machine Learning Engineer to join the DS & AI organization in Paris. You will own cross-cutting technical challenges, shaping architecture decisions and standardizing ML evaluation across Clinical, Productivity, Phone Assistant, and ASR teams.

You will lead design efforts, drive production patterns, and mentor staff engineers while collaborating with Product, Legal, and Compliance to meet EU requirements. This role blends technical depth with strategic influence.