Senior AI Engineer – Patient Team (x/f/m)

Doctolib (Italy); Paris; Vor Ort; EUR 120.000 - 170.000; Vollzeit

Benefits dieser Stelle

Health insurance

25 days vacation

RTT days

Lunch vouchers

Zusammenfassung

Doctolib is hiring a Senior AI Engineer to join the Patient team in Paris. You will design and ship the production search and recommendation engines behind our health companion, enabling hundreds of millions of patients across Europe to find the care they need quickly and reliably.

You will collaborate with ML Engineers, PMs and SWEs, iterating on embeddings, vector search and RAG-based approaches while ensuring latency, reliability and observability across the stack.

Qualifikationen

• Ship algorithms to production on ECS-based services in AWS.
• Proven experience shipping search or recommendation systems to production.
• Experience with embeddings, vector search, semantic retrieval, and RAG.
• Familiarity with offline/online evaluation and A/B testing.

Aufgaben

• Design and build production search & recommendation architecture for the Patient team.
• Establish strong baselines and model selection strategies.
• Implement evaluation and observability across stages (offline/online).
• Set up data/event feedback loops to drive ML iteration.
• Improve search relevance and ranking for patient-facing products.
• Own production quality: latency, reliability, monitoring.

Kenntnisse

Production deployment

Vector search

ML pipelines

Observability

Tools

AWS ECS

Vertex AI

RAG/LLM-based rerankers

Jobbeschreibung

Overview

Join our mission, join Doctolib! 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 well‑being.

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

• 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).
• Establish strong baselines first (prompts, RAG, model selection) before reaching for custom ML.
• 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/and AI engineer shipping search or recommendation systems to production.
• Hands‑on experience building end‑to‑end retrieval: ranking, reranking pipelines and familiar 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: you 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.

Desired Additional Experience

• Experience at a B2C marketplace (e‑commerce, hospitality, travel).
• Additional ML methodologies: pattern mining, recommendation systems, experimentation, or causal inference.
• Experience with search engines or information retrieval concepts.
• Exposure to learning‑to‑rank or feature engineering (for breaking ceilings later, alongside ML Engineers).
• 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.
• Parent Care Program: receive one additional month of leave on top of the legal parental leave.
• 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 interview.
• A final interview.
• Reference check.

Job Details

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

Equal Opportunity Statement

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, 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! All information provided is processed by Doctolib for application management. For data processing details, click here: Germany l France l Italy l Netherlands. Please contact hr.dataprivacy(at)doctolib.com to exercise your rights.