Senior Site Reliability Engineer - Observability (x/f/m)

Doctolib

YOUR IMPACT We are looking for a Senior Machine Learning Engineer to join the ML Engineering team in Patient Solutions. Your mission will be to improve how people access quality care and manage their health over time by building and leading AI and ML systems that create real, measurable impact. You will work in a feature team developing intelligent patient-facing solutions, from smart practitioner discovery to long-term care management, playing a key technical role in shaping how we scale our AI capabilities across Europe. Working in the tech team at Doctolib means building innovative products and features to improve the daily lives of care teams and patients.   WHAT YOU'LL DO Your responsibilities include but are not limited to: * Design and implement ML and AI solutions aligned with patient product goals, covering search, retrieval, and personalized care pathways * Build and maintain large-scale retrieval pipelines, including hybrid search, embedding systems, vector databases, and multi-stage re-ranking architectures * Develop, fine-tune, and evaluate LLM and VLM models using techniques such as knowledge distillation, Mixture-of-Experts (MoE) architectures, and prompt engineering * Build and orchestrate agentic AI systems, integrating external data and capabilities through tools and MCP-based integrations * Define metrics aligned with product goals, run controlled end-to-end experiments using W&B, MLFlow, or Braintrust, and communicate findings to guide product and technical decisions * Deploy solutions to production in collaboration with our ML platform team, ensuring reliability, observability, and performance at scale, and act as a technical reference to elevate the team's standards and practices   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'll be a great fit if you: * You have 7+ years of experience in Machine Learning, Deep Learning, or AI Engineering, with a strong track record of taking models from prototype to production at scale * You have strong experience in Information Retrieval and modern retrieval stacks: hybrid search (sparse + dense), large-scale embeddings and vector databases, multi-stage retrieval and re-ranking pipelines, RAG architectures, and tool/MCP-based integrations * You are proficient in LLM and VLM application development: fine-tuning, MoE architectures (via LiteLLM or Model Garden), knowledge distillation, prompt engineering, and systematic benchmarking of LLM/VLM systems * You have hands-on experience building and orchestrating agentic AI systems (e.g., using ADK) * You demonstrate strong scientific rigor: designing metrics aligned with product goals, running controlled experiments, and communicating results clearly to both product and engineering stakeholders * You have experience operating large-scale applications in production (monitoring, reliability, performance, observability), bring strong analytical skills, and approach your work with a user-first mindset. You are fluent in English   It would be fantastic if you: * Have experience in B2C marketplace environments * Have experience in other ML methodologies: pattern mining, recommendation systems, experimentation, or causal inference   LIFE AT DOCTOLIB TECH * Our solutions are built on a single fully cloud-native platform that supports web and mobile app interfaces, multiple languages, and is adapted to country and healthcare specialty requirements. * Our stack is composed of Rails, TypeScript, Java, Python, Kotlin, Swift, and React Native. * We leverage AI ethically across our products to empower patients and health professionals. Discover our AI vision here. Want to learn more about our tech culture and environment? Visit the Doctolib Tech site.   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   OUR INTERVIEW PROCESS * Recruiter Interview * Feature Building Interview * System Design Interview * Behavioral Interview * At least one reference check We want your experience to be clear, respectful, and transparent. Learn more about our hiring process on our candidate experience page.   JOB DETAILS * Permanent position * Full-time * Location: Doctolib Paris office in Levallois-Perret * Hybrid work setup (3 days/week in the office) * Start date: as soon as possible   WE WELCOME EVERYONE 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!   YOUR DATA PRIVACY All information provided is processed by Doctolib for application management. For data processing details, click here: France. Please contact hr.dataprivacy(at)doctolib.com for inquiries or to exercise your rights.

Doctolib

We are looking for an Engineering Manager to join the OREO (Observability Reliability Engineering Obsession) team in Platform Engineering. As an Engineering Manager, your mission will be to lead the Reliability & Observability team and drive the evolution of Doctolib's observability platform, supporting the exponential growth of Doctolib services while building and empowering a world-class SRE team. Working in the tech team at Doctolib involves building innovative products and features to improve the daily lives of care teams and patients. We work in feature teams in an agile environment, while collaborating with product, design, and business teams. You will lead a team of Site Reliability Engineers who are responsible for shaping Doctolib's observability strategy and ensuring our platform remains reliable, debuggable, and scalable. This role sits at the intersection of people management, technical leadership, and strategic planning with a particular focus on building organizational capabilities around logging, metrics, tracing, and alerting. Your team also owns and operates critical transversal services that enable secure, scalable infrastructure management across the organization, including HashiCorp Vault for secrets management and Terraform Enterprise for infrastructure as code. Your responsibilities include but are not limited to:   People Leadership: * Lead, coach, and grow a team of Site Reliability Engineers, supporting their technical development and career progression * Create a culture of operational excellence, continuous improvement, and psychological safety within the team * Conduct regular 1:1s, performance reviews, and career development conversations * Recruit, onboard, and retain top SRE talent aligned with Doctolib's mission and values Technical Strategy: * Partner with SREs and senior engineers to define and evolve the observability strategy across the platform, focusing on logging, metrics, tracing, and alerting * Own the strategy and evolution of critical transversal services including HashiCorp Vault and Terraform Enterprise * Drive prioritization and roadmap planning for large-scale reliability and observability initiatives * Ensure alignment between team objectives and broader engineering and business goals * Advocate for and allocate resources toward reducing technical debt and improving developer experience Operational Excellence: * Own the team's on-call experience and contribute to the incident response processes, ensuring sustainable practices and continuous improvement * Ensure high availability and reliability of transversal services that are critical to the entire engineering organization * Lead postmortem reviews and drive systemic improvements to prevent recurring issues Cross-functional Collaboration: * Work closely with Product Managers, Engineering Managers, and architects to align observability capabilities with product and platform needs * Partner with security and infrastructure teams to evolve secrets management and IaC practices across the organization * Represent the OREO team in engineering leadership forums, architectural reviews, and strategic planning sessions * Foster strong partnerships with software engineering teams to improve instrumentation quality and adoption of observability best practices ABOUT OUR TECH ENVIRONMENT * Our solutions are built on a single fully cloud-native platform that supports web and mobile app interfaces, multiple languages, and is adapted to the country and healthcare specialty requirements. To address these challenges, we are modularizing our platform run in a distributed architecture through reusable components. * Our stack is composed of Rails, TypeScript, Java, Python, Kotlin, Swift, and React Native. * We leverage AI ethically across our products to empower patients and health professionals. Discover our AI vision here and learn about our first AI hackathon here! 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 at least 5+ years of software engineering or SRE experience, with a strong technical background in cloud-native environments (preferably AWS, GCP, and/or Kubernetes-based) * You have 3+ years of engineering management experience, leading technical teams (ideally SRE, platform, or infrastructure teams) * You have deep understanding of observability tooling and architecture (Fluent Bit, OpenTelemetry, Loki, Elasticsearch, Prometheus, Thanos, Datadog) * You have experience with infrastructure as code (Terraform, OpenTofu) and secrets management systems (Vault, AWS Secrets Manager) * You have proven ability to balance technical depth with people leadership, able to mentor engineers, review technical designs, and guide architectural decisions Now it would be fantastic if you: * Have experience scaling SRE or platform teams in fast-growing, high-traffic environments * Have background in designing and operating high-scale telemetry pipelines * Have hands-on experience with HashiCorp Vault and Terraform Enterprise in production environments * Have hands-on experience with backend programming languages (e.g., Go, Python, Ruby) * Have experience driving cultural and technical transformations WHAT WE OFFER * Free comprehensive health insurance for you and your children * ParentCare Program: Enjoy full salary coverage (100%) during your first month of birth leave, and 75% during the second, covered by Doctolib * Free mental health and coaching services through our partner Moka.care * For caregivers and workers with disabilities, a package including an adaptation of the remote policy, extra days off for medical reasons, 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 sport club membership or creative class * Up to 14 days of RTT * A subsidy from the work council to refund part of the membership to a sport club or a creative class * Lunch voucher with Swile card THE INTERVIEW PROCESS * 30-min phone screen with a Tech Recruiter * 1h30 technical interview (SRE System Design & Architecture) * 1h15 behavioral interview (Leadership & People Management) * 1h30 Engineering Management case study (team scenarios, prioritization, and conflict resolution) * 1h manager interview with Senior Engineering Leadership * At least one reference check JOB DETAILS * Permanent position * Full-time * Levallois-Perret, 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.

Doctolib

WHY THIS ROLE As our Director of Site Reliability Engineering, reporting to our VP of Platform Engineering, you'll own the core infrastructure layers that everything at Doctolib runs on: cloud infrastructure, database operations, network infrastructure, and observability. You will also lead the Doctolib Operations Center (DOC) and drive a decisive shift from reactive operations to a proactive, world-class reliability culture. This is a rare opportunity to shape the infrastructure backbone of Europe's leading healthtech company, at a moment when Doctolib is actively expanding multi-cloud capabilities, scaling to new countries, and building the reliability culture that will define the next decade of healthcare innovation. Why this is an extraordinary challenge * Real stakes, every day. When Doctolib is down, consultations don't happen, diagnoses are delayed, care journeys are interrupted. The infrastructure you build is a direct lever on patient outcomes — in a world where 8 of the top 10 causes of death in Europe are preventable. * A once-in-a-generation platform transition. Multi-cloud, monolith modularisation, international expansion — all happening simultaneously. You won't inherit a finished platform. You'll define what it becomes. * Reliability as the competitive moat. As we scale AI health companions, automate clinical workflows, and launch across Europe, the speed and resilience of the platform directly determines how fast 700+ engineers can ship innovations that change healthcare. * A cultural build, not just a technical one. The incident response culture, observability standards, and operational ownership model you establish here will shape how Doctolib engineers work for years to come. WHAT YOU'LL DO * Build and run a world-class SRE org of 25+ engineers across Cloud Infrastructure, Database & Storage, Network Infrastructure, Observability Tooling, and the Doctolib Operations Center * Own the infrastructure strategy and roadmap — cloud, database, network, observability — and deliver against company OKRs * Lead the Doctolib Operations Center: set incident response standards, drive MTTR reduction, embed blameless post-mortem culture across engineering * Architect and execute our multi-cloud strategy — reducing vendor lock-in, cutting migration costs, and enabling international expansion * Own network infrastructure at scale: load balancing, CDN/WAF, VPCs, peering, zero-trust networking across a high-traffic, multi-country platform * Drive observability as a product — give 700+ engineers true visibility into system health and turn observability maturity into an operational excellence lever * Lead from the front as a senior technical voice in the Platform org and broader Tech leadership team WHO YOU ARE * 12+ years in software engineering, including 5+ years leading managers and running infrastructure or SRE organisations at scale * Track record of taking SRE practices from reactive to proactive — with measurable reductions in incidents and MTTR * Strong multi-cloud and network infrastructure experience: load balancing, CDN/WAF, VPCs, peering, at high-traffic scale * Deep database operations background: large-scale transactional systems (PostgreSQL, Aurora), streaming/CDC (Kafka), data layer FinOps * Experience building observability platforms that give teams genuine visibility — metrics, logs, traces, alerting * Sharp process thinking: SLOs, error budgets, incident management, blameless post-mortems * Outcome-driven: you track reliability, cost efficiency, and engineering velocity as business metrics, not just technical ones * Strong communicator and influencer at executive level — equally credible with senior engineers and business stakeholders * Builder of high-performing, people-first engineering cultures * Fluent in English; comfortable in fast-paced, international environments * You recognise yourself in our playbook values Bonus Points If You Have… * Experience in healthcare, regulated, or high-compliance industries (HDS, ISO 27001, SOC2, GDPR, data sovereignty) * Familiarity with our stack: Ruby on Rails, Node.js, Go, Python, React, AWS, GCP, Kubernetes, PostgreSQL, Datadog, GitHub Actions * French language proficiency * Experience with AI-augmented infrastructure tooling or ML platform operations * M&A or post-acquisition infrastructure integration experience WHAT WE OFFER * Free comprehensive health insurance for you and your children * Parent Care Program: receive additional 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 an adaptation of the remote policy, extra days off for medical reasons, and psychological support * Work from abroad for up to 10 days per year thanks to our flexibility days policy * Work Council subsidy to refund part of sport club membership or creative class * Up to 14 days of RTT * A subsidy from the work council to refund part of the membership to a sport club or a creative class  * Lunch voucher with Swile card 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.   #LI-DB1