Senior AI Engineer - Phone Assistant

We are looking for a Senior AI Engineer to join the Conversational AI team to build and scale Doctolib's Phone Assistant product. You'll work with cutting-edge AI, NLP, and speech recognition technologies to revolutionize patient-practitioner interactions and practice management for millions of users.

What you'll do

• Design, ship, and operate production-grade agentic LLM systems that improve patient-practitioner interaction and streamline healthcare workflows
• Validate hypothesis with offline evaluation datasets and A/B tests on real traffic
• Partner with other machine learning teams to design and improve evaluation pipelines, security/safety guardrails, and metrics
• Develop and maintain core agentic capabilities, including memory, reasoning orchestration, and tool adapters
• Own performance, observability, and security through monitoring dashboards, SLO/SLI, and security posture
• Ensure privacy and security by design
• Contribute to cross-functional initiatives that shape Doctolib's future AI platform and best practices

What you'll need

• 6+ years of experience as a software engineer with significant Python experience
• Track record with the full lifecycle of an AI product at scale, from evaluation and launch to production iterations
• Understanding of software development best practices including automated testing, CI/CD, and DevOps
• Product-oriented mindset with ability to balance business needs with technical constraints
• Strong focus on code quality and rigorous testing culture
• Experience sharing knowledge through pair programming and mentoring
• Comfortable speaking and writing in English for daily team communication

Nice to have

• Experience with agentic systems in production
• Experience in the medical domain

What they offer

• Deutschlandticket (Germany-wide public transport) fully paid
• 28 vacation days + 1 additional day per year (max 30 days)
• Work from abroad for up to 10 days per year
• Company health insurance and pension scheme with employer subsidy
• Free mental health services and subsidized sports membership
• Flexible hybrid workplace policy with subsidized meal benefits