Senior Software Engineer - Node.js/TypeScript (x/f/m)

<h2><strong>Set a new pulse for healthcare!</strong></h2> <p>We are looking for a <strong>Senior Software Engineer</strong> to join the <strong>DIAL</strong> team in the <strong>Phone Assistant</strong> domain.

</p> <p>Your mission will be to design, build, and scale the AI-powered features that transform how practitioners and patients connect over the phone — making care more accessible for patients and reducing administrative burden for health professionals.

You will work in a feature team developing the Phone Assistant, Doctolib's solution that combines LLM reasoning, speech recognition, and real-time backend systems, launching first in Germany and expanding to France and Italy.

 </p> <p>Working in the tech team at Doctolib means building innovative products and features to improve the daily lives of care teams and patients.

</p> <h2><strong>What you'll do</strong></h2> <p>Your.

Responsabilidades

• Build and operate backend services in Node.js/TypeScript (with Python exposure), designing for reliability, scalability, and real-time performance
• Design, evaluate, and ship LLM-based features end-to-end: prompt engineering, tool calling, structured outputs, guardrails, and fallback strategies
• Own AI feature quality: build evaluation datasets and scorers (e.g., in Braintrust), track regressions, and make evidence-based ship decisions before each release
• Deploy and operate cloud-native services on Kubernetes across major cloud providers (AWS/Azure/GCP), and evolve CI/CD pipelines with GitHub Actions
• Design data models and drive database migrations and performance tuning for real-time workloads (PostgreSQL: connection pooling, indexing, query optimisation)
• Maintain a high testing bar (unit, integration, e2e), debug distributed systems in production with strong observability, and contribute to pragm...