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

📋 Description

• Build and operate backend services in Node.js/TypeScript, designing for reliability, scalability
• Design, evaluate, and ship LLM-based features end-to-end: prompt engineering, tool calling
• Own AI feature quality: build evaluation datasets and scorers (e.g., in Braintrust), track
• Deploy and operate cloud-native services on Kubernetes across major cloud providers
• Design data models and drive database migrations and performance tuning for real-time workloads
• Maintain a high testing bar (unit, integration, e2e), debug distributed systems in production with

🎯 Requirements

• 5+ years of backend engineering experience building scalable, resilient systems in
• Hands-on production experience building LLM-based features: prompting, tool calling, structured
• Proven experience deploying and operating services on Kubernetes within at least one major cloud
• Strong testing culture (unit/integration/e2e), sharp debugging skills for microservices and
• Fluent in English, with a collaborative mindset and the drive to own problems end-to-end — from

🎁 Benefits

• Deutschlandticket (Germany-wide public transport pass) fully paid for by Doctolib
• 28 vacation days + 1 additional day for each full calendar year of employment (up to a maximum of
• Work from abroad for up to 10 days per year thanks to our flexibility days policy
• Company health insurance with great supplementary benefits through our partner Allianz
• Company pension scheme (bAV) through Allianz with an employer subsidy of 40% (15% within the
• The Doctolib Parent Care program, which includes one month additional parental leave and much more