
Doctolib · Paris
What you’ll do We are looking for a Principal Machine Learning Engineer to join the DS & AI organization at Doctolib. This is a transversal force multiplier ro...
What you’ll do
We are looking for a Principal Machine Learning Engineer to join the DS & AI organization at Doctolib. This is a transversal force
multiplier role operating across all AI teams: Clinical, Productivity, Phone Assistant and ASR. Rather than working within a
single feature team, you will own the cross-cutting technical challenges: defining how Doctolib's product and AI teams build
agentic solutions, standardizing ML evaluation frameworks, and spreading strong engineering practices across the org. You will
unblock teams, shape architecture decisions, and take on the deep technical work that requires senior ML judgment at scale,
directly impacting the daily lives of 400,000 healthcare professionals and the health of 80 million patients. Building at Doctolib
means delivering innovative products that measurably improve outcomes for care teams and patients alike.
Technical Strategy & Architecture
decisions
model and agentic performance
quantification, cost optimization, and observability
technical guidance, and practice propagation
Act)
Who you are
Before you read on, if you don't have the exact profile described below, but you feel this job description matches your skill set,
we still encourage you to apply.
systems, or reinforcement learning
production (AWS/GCP)
Life at Doctolib Tech
and healthcare specialties.
Want to learn more about our tech culture and environment? Visit the Doctolib Tech site.
What we offer
The interview process
We want your experience to be clear, respectful, and transparent. Learn more on our candidate experience page.
Job details
We welcome everyone
At Doctolib, we believe in improving access to healthcare for everyone - regardless of where you come from or what you look like.
We evaluate candidates based solely on qualifications and motivation, without any form of discrimination. We respect and celebrate
diversity!
The more diverse ideas are heard, the more our product will truly improve healthcare for all. You are welcome to apply regardless
of gender, religion, age, sexual orientation, ethnicity, disability, or place of origin.
To ensure equal opportunities, we invite you to exclude personal information (e.g., pictures, age) from your applications. If you
have a disability, let us know if there's any way we can make the interview process smoother for you! Join us in building the
healthcare we all dream of.
Your data privacy
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data, click here. For inquiries or to exercise your rights, contact us at hr.dataprivacy(at)doctolib.com.
WHAT YOU’LL DO We are looking for a Senior Staff Machine Learning Engineer to join the Clinical team in the AI and Machine Learning Department. You'll lead the technical direction of AI systems that enhance clinical decision-making and patient care. You'll tackle the hardest problems in healthcare AI, from building voice-powered consultation assistants to establishing LLM evaluation frameworks that ensure clinical safety and efficacy. This role combines deep R&D with strategic technical leadership, shaping how Doctolib deploys AI in regulated healthcare environments. Your responsibilities include but are not limited to: Technical Strategy & Architecture * Own the long-term technical roadmap for clinical ML systems, from model architecture selection to production deployment patterns * Drive strategic build vs. buy decisions, balancing custom development with foundation model APIs * Define standards for safe rollout in healthcare contexts: shadow testing, staged deployment, and human-in-the-loop workflows End-to-End ML Delivery * Lead design and implementation of LLM-powered clinical agents (consultation summarization, clinical coding, evidence-grounded recommendations) * Establish rigorous evaluation frameworks using real-world clinical datasets, ensuring outputs meet clinical accuracy and safety standards * Build production infrastructure: model and prompt versioning, guardrails, uncertainty quantification, cost optimization, and observability * Define a bold strategy for online and offline performance objectives to reach new levels of healthcare professionals satisfaction Leadership & Impact * Mentor Staff or Senior ML Engineers and Applied Scientists, elevating technical standards across the organization * Lead cross-functional initiatives spanning Product, Medical Affairs, Legal, and Compliance teams * Translate clinical needs into research questions and production systems that measurably improve patient outcomes * Partner with our medical, legal, and compliance teams to meet EU regulatory expectations (e.g., GDPR, MDR, upcoming EU AI Act) and market standards. WHO YOU ARE Before you read on, if you don't have the exact profile described below, but you feel this job description matches your skill set, we still encourage you to apply. * You have 10+ years in ML/AI with 3+ years at Staff+ or Principal level leading complex, multi-team technical initiatives * You have a PhD in Computer Science, AI, Statistics, or related field (or equivalent research experience) * You have deep expertise in at least two of: clinical NLP, LLM fine-tuning and evaluation, automatic speech recognition, RAG systems, or reinforcement learning * You are expert in Python, PyTorch/Transformers for training, vLLM/similar for inference with a track record deploying ML systems in production (AWS/GCP) * You have exceptional communication skills and are able to align diverse stakeholders and explain complex technical decisions Now it would be fantastic if you have: * Publications in top-tier ML/AI conferences (NeurIPS, ICLR, ACL) or medical informatics venues * Experience with EU healthcare regulations (GDPR, MDR, AI Act) * Prior work with clinical data or healthcare applications WHAT WE OFFER * 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 * ParentCare Program: Enjoy full salary coverage (100%) during your first month of birth leave, and 75% during the second, covered by Doctolib * Enrollment in Doctolib's long-term employee value sharing plan called DoctoGrowth * For caregivers and workers with disabilities, a package including an adaptation of the remote policy, extra days off for medical reasons, and psychological support * Relocation support in case of international mobility * Access to the best AI tools for coding, development and dedicated training THE INTERVIEW PROCESS * HR Screen * Hiring Manager Interview * Behavioral Interview * Technical Questions * Technical Case Study * At least one reference check JOB DETAILS * Permanent position * Full-time * Hybrid work mode (3 days/week in the office) * Paris, France * Start date: as soon as possible If you would like to find out more about tech life at Doctolib, feel free to read our latest Medium blog articles! 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. Please contact hr.dataprivacy(at)doctolib.com for inquiries or to exercise your rights. * *
Les entreprises qui performent décident mieux. Depuis 2006, Ekimetrics aide les organisations à transformer leurs décisions en avantage concurrentiel durable grâce à des solutions d’IA. Notre double ambition est d’allier performance et durabilité, pour construire un leadership pérenne. Nos solutions sont une combinaison unique de People et de technologie. Notre plateforme Eki.Decisions complète l’expertise de nos équipes en marketing, efficacité commerciale et data science, pour connecter l’IA aux décisions qui structurent toute l’organisation. Avec une équipe 100% internalisée et des bureaux à Paris, Londres, New York, Hong Kong et Shanghai, nous nous engageons pour une IA responsable et frugale, pour garantir un avantage concurrentiel constant, et pour rester fidèles à nos valeurs et à notre ADN. Votre mission Nous recherchons un QA Engineer confirmé pour rejoindre notre équipe Produit et renforcer notre dispositif de contrôle qualité. Vous jouerez un rôle clé dans la fiabilité et la performance des solutions data & IA développées au sein d’Ekimetrics, en intervenant sur un périmètre fonctionnel étendu : applications, APIs, pipelines data et modèles de machine learning. Vous serez responsable de la définition, de la mise en œuvre et de l’automatisation des stratégies de test, avec un haut niveau d’exigence en matière de rigueur, de couverture et de traçabilité. Votre contribution permettra d’améliorer la robustesse de nos plateformes, d’accélérer nos cycles de livraison et de garantir une qualité irréprochable pour nos utilisateurs internes et externes. Automatisation & Développement de tests - Développer et maintenir des suites de tests automatisés (Playwright, Typescript). - Couvrir un scope large : APIs, front-end, data pipelines, intégrations modèles. Stratégie de test & robustesse - Définir et exécuter des stratégies de test complètes : fonctionnel, régression, exploratoire. - Identifier les edge cases et renforcer la robustesse des produits. - Vérifier la clarté et la cohérence des tests, assurer un bon taux de couverture. Qualité & Process - Mettre en place des outils et frameworks QA pour industrialiser les pratiques. - Contribuer aux quality gates avant release. - Détecter les anomalies en amont et collaborer avec les devs pour les résoudre rapidement. Ce rôle requiert autonomie, sens de l’initiative et capacité à collaborer efficacement avec les équipes techniques. Vous évoluerez dans un environnement stimulant, au cœur de projets stratégiques, où votre expertise sera essentielle pour soutenir notre ambition d’excellence technologique et opérationnelle. Votre profil - 4-8 ans d’expérience en QA engineering. - Maîtrise de Playwrigh et Typescript (framework principal utilisé). - Connaissance de Xray, Jest ou outils équivalents. - Capacité à développer des tests automatisés de bout en bout. - Sensibilité à la GenAI pour générer du code et accélérer les workflows. - Forte autonomie, prise d’initiative, proactivité et motivation. - Capacité à documenter, analyser et remonter les problèmes efficacement. - Bonnes compétences de debugging.
L’histoire du groupe Theodo et son succès Theodo accompagne depuis 2009 les entreprises innovantes dans la conception, le développement et le déploiement de produits digitaux ingénieux - tels que la plateforme TF1+, l'application LCL Pro ou l'application France Identité Numérique - en tirant parti du meilleur de la technologie et de l’approche Lean. Theodo connait une croissance exceptionnelle depuis 15 ans : nos équipes rassemblent plus de 700 Theodoers, principalement des Software Engineers, passionnés de technologie et d’amélioration continue. En 2025, le groupe Theodo génère 100M€ de CA. Créée en 2016, Theodo Data & AI est l'entité Data et IA de Theodo. Notre ambition est d'accompagner nos clients dans la conception et le déploiement de leur stratégie data ainsi que la recherche et le développement de solutions d’intelligence artificielle à l’état de l’art. L'entreprise est en pleine croissance : chaque année, Theodo Data & AI enregistre une croissance de plus de 30 % de son chiffre d'affaires, ouvrant ainsi de nouvelles opportunités passionnantes pour les Theodoers ! Le poste d’Engineering Manager IA est basé sur deux piliers majeurs : expertise technique et impact sales. Expertise technique Améliorer la qualité tech sur les projets Aider le tech lead dans les choix techniques et sur le delivery Être référent technique sur certains projets complexes Impact Sales Participe à la renommée / crédibilité de Theodo sur les sujets IA à l’extérieur S’investir dans la partie vente et avant-vente des projets IA