Senior AI Engineer - Patient Health Platform (x/f/m)

Doctolib; Paris; Sur place; EUR 110 000 - 150 000; Plein temps

Avantages offerts par ce poste

Health insurance

Vacation days

Mental health services

Work from abroad

Lunch vouchers

Sport club subsidy

Transport subsidy

DoctoGrowth

ParentCare program

Disability accommodation

Résumé du poste

Doctolib is seeking a Senior AI Engineer for the Patient team in Paris to design and own search and recommendation systems powering patient access to care. You will work with ML Engineers, PMs, and SWEs to deliver fast, trusted AI-powered features at scale across Europe.

The role focuses on end-to-end retrieval pipelines, vector search, embedding models, and production-ready pipelines with strong emphasis on observability, latency, and reliability.

Qualifications

• Production deployment to production (ECS-based service on AWS).
• Strong analytical mindset: result-oriented, patient-first approach.
• Significant experience as a software or AI engineer shipping search or recommendation systems to production.
• Hands-on experience building end-to-end retrieval: ranking, reranking pipelines and familiarity with nDCG, MAP, Recall@k, MRR.
• AI-engineering proficiency: embeddings & vector search, semantic retrieval, RAG, LLM-based or managed rerankers.
• Architecture-first approach: build the system, baselines, evals, and feedback loops with standard tooling.
• Evaluation & observability built into every stage (retrieval, ranker, reranker) – offline/online eval, A/B testing, position-bias handling, monitoring.
• Production deployment – low-latency services with high SLA targets.

Responsabilités

• Design and build the production search & recommendation architecture: full retrieval, ranking, reranking pipeline with standard and off-the-shelf components.
• Build evaluation and observability into every stage, with offline and online evaluation.
• Set up 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 with PMs and SWEs to define, build, and ship AI-powered features.

Connaissances

Production deployment

Analytical mindset

AI software engineering

Retrieval & ranking

LLM-based rerankers

Vector search

System architecture

Observability

Outils

AWS ECS

Vertex AI

Description du poste

Senior AI Engineer – Patient Team – Paris

We are looking for a Senior AI Engineer to join the Patient team in Paris. The Patient domain sits at the heart of Doctolib's mission: ensuring everyone has better access to the care they need, receives better care from health professionals, and can actively prevent health problems to improve their wellbeing.

You’ll design the search and recommendation engines behind our health companion, helping 100M patients across Europe instantly navigate to the exact care they need while delivering trusted, curated insights at every step. The retrieval and recommendation architecture you own will directly shape how relevant, fast, and trustworthy that experience is for every one of them.

Responsibilities

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).
• 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.

Qualifications

• Production deployment: ability to ship algorithms to production (ECS-based service on AWS).
• Strong analytical mindset: result-oriented, patient-first approach.
• Significant experience as a software or AI engineer shipping search or recommendation systems to production.
• Hands‑on experience building end‑to‑end retrieval: ranking, reranking pipelines and familiarity with nDCG, MAP, Recall@k, MRR.
• AI‑engineering proficiency: turning foundation models and off-the-shelf components into production systems – embeddings & vector search, semantic retrieval, RAG, LLM‑based or managed rerankers (e.g., Vertex AI). You can succeed without training a model from scratch.
• Architecture‑first approach: build the system, baselines, evals, and feedback loops with standard tooling before reaching for custom ML, and know when to partner with ML Engineers to break a ceiling.
• Evaluation & observability built into every stage (retrieval, ranker, reranker) – offline and online eval, A/B testing, position‑bias handling, monitoring.
• Production deployment – ability to ship reliable, low‑latency services to production (hundreds‑of‑ms SLAs), with care for data quality and long‑term maintainability.

Preferred

• Experience at a B2C marketplace (e‑commerce, hospitality, travel).
• Additional ML methodologies: pattern mining, recommendation systems, experimentation, or causal inference.
• Experience with search engines and information retrieval concepts.
• Exposure to learning‑to‑rank or feature engineering.
• Experience in a healthcare or other regulated domain (GDPR / HDS).

Benefits

• Free comprehensive health insurance (basic package) for you and your children.
• 25 days of paid vacation per year, plus up to 14 days of RTT.
• Free mental health and coaching services through our partner Moka.care.
• Work from abroad for up to 10 days per year thanks to our flexibility days policy.
• Lunch vouchers (Swile card) worth €8.50 per working day, with €4.50 covered by Doctolib.
• A subsidy from the work council to refund part of the membership to a sport club or a creative class.
• 50% reimbursement of your public transport subscription.
• Enrollment in Doctolib's long‑term employee value sharing plan called DoctoGrowth.
• ParentCare Program: Enjoy full salary coverage (100%) during your first month of birth leave, and 75% during the second, covered by Doctolib.
• For caregivers and workers with disabilities, a package including an adaptation of the remote policy, extra days off for medical reasons, and psychological support.

Interview Process

• A first interview with a member of the Talent Acquisition team.
• A coding interview.
• An agentics system design.
• A final interview.
• Reference check.

Job Details

• Permanent position.
• Full Time.
• Workplace: Levallois.
• Start date: As soon as possible.

Equal Opportunity

At Doctolib, we are committed to improving access to healthcare for everyone. This translates into our recruitment process. We evaluate candidates based solely on qualifications and motivation, without any form of discrimination.

The more diverse ideas are heard, the more our product will truly improve healthcare for all. You are welcome to apply to Doctolib, regardless of your gender, religion, age, sexual orientation, ethnicity, or disability.

To ensure equal opportunities, we invite you to exclude personal information (e.g., pictures, age) from your applications. If you require any accommodation, please let us know for support during the hiring process.

Join us in building the healthcare we all dream of!

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