Senior AI Data Engineer (x/f/m)

What you’ll do

At Doctolib, we're on a mission to transform healthcare through the power of AI. As a Senior Data Engineer, you'll play a key role in building and optimizing the data foundations within the AI Team to deliver safe, scalable, and impactful models.

You will join a dedicated team working on data infrastructure for LLM, VLM and RAG-based systems, powering our new AI Medical Companion.

Your work will ensure that our engineers and data scientists can train, evaluate, and deploy AI models efficiently on high-quality, well-structured, and compliant data.

Your responsibilities include but are not limited to:

• Ensure high standards of data quality for AI model inputs.
• Design, build, and maintain scalable data pipelines on Google Cloud Platform (GCP) for AI and machine learning use cases.
• Implement data ingestion and transformation frameworks that power Retrieval systems and training datasets for LLMs and multimodal models.
• Architect and manage NoSQL and Vector Databases to store and retrieve embeddings, documents, and model inputs efficiently.
• Collaborate with ML and platform teams to define data schemas, partitioning strategies, and governance rules that ensure privacy, scalability, and reliability.
• Integrate unstructured and structured data sources (text, speech,image, documents, metadata) into unified data models ready for AI consumption.
• Optimize performance and cost of data pipelines using GCP native services (BigQuery, Dataflow, Pub/Sub, Cloud Storage, Vertex AI).
• Contribute to data quality and lineage frameworks, ensuring AI models are trained on validated, auditable, and compliant datasets.
• Continuously evaluate and improve our data stack to accelerate AI experimentation and deployment.

Who you are

You could be our next teammate if you have:

• Master’s or Ph.D. degree in Computer Science, Data Engineering, or a related field.
• 5+ years of experience in Data Engineering, ideally supporting AI or ML workloads.
• Strong experience with the GCP data ecosystem
• Proficiency in Python and SQL, with experience in data pipeline orchestration (e.g., Airflow, Dagster, Cloud Composer).
• Deep understanding of NoSQL systems (e.g.,  MongoDB) and vector databases (e.g.,  FAISS, Vector Search).
• Experience designing data architectures for RAG, embeddings, or model training pipelines.
• Knowledge of data governance, security, and compliance for sensitive or regulated data.
• Familiarity with W&B / MLflow / Braintrust / DVC for experiment tracking and dataset versioning (extract snapshots, change tracking, reproducibility).
• Familiarity with  (Docker, Kubernetes) and CI/CD for data workflows.containerized environments
• A collaborative mindset and passion for building the data foundations of next-generation AI systems.

What we offer

• Free health insurance for you and your children
• Parent Care Program: receive one additional month of leave on top of the legal parental leave
• Free mental health and coaching services through our partner Moka.care
• For caregivers and workers with disabilities, a package including remote policy adaptations, extra days off, and psychological support
• Work from EU countries and the UK for up to 10 days per year, thanks to our flexibility days policy
• Work Council subsidy to refund part of your sport club membership or creative class
• Up to 14 days of RTT
• Lunch voucher with Swile card
  
  

The interview process

1. HR Screen
2. Technical Deep Dive 
3. System Design
4. Behavioral Interview
5. Reference check and criminal records check

Offer!