Staff Software Engineer - Business Performance (x/f/m)

JOIN OUR MISSION, JOIN DOCTOLIB! Doctolib is growing, and we are looking for a Staff Software Engineer to join the Workstations teams in Business Performance. Your mission will be to eliminate administrative overhead for Doctolib's customer-facing teams (Sales, Account Management, and Product Support) so that every minute spent with a customer goes entirely to conversation and expert judgment. You will work in a feature team developing the Workstations: a single, modular interface that brings together information from all our systems and lets teams act in all of them. From planning who to contact, to preparing with an instant customer brief, to live AI suggestions and automatic follow-up, you will contribute directly to transforming how thousands of colleagues work and, through them, the quality of service delivered to healthcare professionals and patients. Working in the tech team at Doctolib means building innovative products and features to improve the daily lives of care teams and patients. YOUR IMPACT Your responsibilities include but are not limited to: - Build and ship reusable frontend modules, each exposed behind a clear API or MCP, ensuring strong modularity across different appShell - Integrate AI capabilities directly into real workflows: live transcription, intent detection, summarisation, CRM auto-filling, and agents operating with the same permissions and audit trail as the UI - Connect and extract logic from existing systems (Salesforce, core platform, billing, telephony) and expose them as standalone, maintainable services - Drive make-or-buy decisions by evaluating third-party tools against Doctolib's technical criteria for scale, security, and multi-country requirements - Partner closely with end users (Sales, Account Management, Support) and Product Managers through user interviews, prototypes, and rapid feedback loops to turn complex workflows into simple products - Define and track quality metrics — latency, accuracy of AI suggestions, share of tasks completed within the workstation — and use them to drive continuous improvement - Raise the bar for the team through rigorous code reviews, technical design leadership, and mentoring - You will also help rethink our SDLC with AI at its core: automated code review, and making sure our agents always have the right context to do useful work 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 https://careers.doctolib.com/ai-careers/. Want to learn more about our tech culture and environment? Visit the Doctolib Tech site https://careers.doctolib.com/tech-doctolib/. 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 could be our next team mate if you: - Have 8+ years of experience as a Software Engineer, with strong foundations in software and system design at scale - Are comfortable working in a React and Java or Ruby on Rails environment and open to being hands-on across the stack as the project demands - Have practical experience integrating LLMs in production — prompting, evaluations, latency and cost trade-offs, agents, tool calling or MCP — or a strong drive to get there fast - Are comfortable working close to business users, translating messy real-world workflows into clean, intuitive product experiences - Take data protection and privacy seriously: you work with sensitive data and apply security best practices as a matter of course - Are fluent in English It would be fantastic if you: - Have contributed to internal tooling or workflow automation products at scale - Have experience with event-driven architectures and integrating with CRM systems (e.g. Salesforce) - Are familiar with telephony integrations or real-time transcription pipelines 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 http://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 - 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 https://careers.doctolib.com/tech-doctolib/getting-hired/. JOB DETAILS - Permanent position - Tech stack: React, Java, Ruby on Rails - Full-time - Nantes - Hybrid work setup (up to 2 remote days per week) - 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 p