7 hours ago
Berlin, GermanySenior
Responsibilities
- Build and operate scalable, reliable, real-time backend services using Node.js/TypeScript with some Python.
- Design, evaluate, and ship LLM-based features involving prompt engineering, tool calling, structured outputs, guardrails, and fallback strategies.
- Build evaluation datasets and scorers, track regressions, and make evidence-based release decisions for AI features.
- Deploy and operate cloud-native services on Kubernetes across AWS, Azure, or GCP and evolve GitHub Actions CI/CD pipelines.
- Design data models, manage PostgreSQL migrations, and optimize connection pooling, indexing, and queries for real-time workloads.
- Develop and maintain unit, integration, and end-to-end tests; debug distributed production systems and contribute to secure architecture decisions.
Requirements
- 5+ years of backend engineering experience building scalable and resilient systems with Node.js/TypeScript, plus some Python.
- Hands-on production experience building LLM-based features, including prompting, tool calling, structured outputs, evaluation frameworks, and real-world failure handling.
- Production experience deploying and operating Kubernetes services on at least one major cloud provider, with solid CI/CD practices.
- Strong testing, debugging, microservices, distributed-systems, and code-quality skills.
- Fluent English and the ability to collaborate and own work end-to-end from design through production.
- Preferred experience with speech pipelines, ASR, TTS, streaming audio, voice agents, event-driven architectures, message brokers, and PostgreSQL.
- Interest in telephony and real-time communication technologies such as SIP, RTP, or WebRTC is helpful but not required.
Benefits
- Permanent, full-time position in Berlin with a hybrid work setup of up to two remote days per week and an ASAP start date.
- Fully paid Deutschlandticket, 28 vacation days plus tenure-based additional days up to 30, and up to 10 work-from-abroad days per year.
- Company health insurance, pension scheme with employer subsidy, parental leave and caregiver support, and relocation support for international mobility.
- Employee value-sharing plan, free mental health and coaching services, subsidized sports membership, and subsidized meals.
- Access to AI coding tools, development resources, and dedicated training.
Tech Stack
Apache KafkaAWSAzureGitHub ActionsGoogle Cloud PlatformJavaKotlinKubernetesNode.jsPostgreSQLPythonRabbitMQReact NativeRuby on RailsSwiftTypeScript
Categories
About Doctolib
Doctolib builds a digital healthcare platform for patients and medical professionals, combining online appointment booking, teleconsultations, and practice-management software. It monetizes via SaaS subscriptions to healthcare providers, while access for patients is free. Founded in 2013 and headquartered in Levallois‑Perret, the privately held company operates across France, Germany, Italy, and the Netherlands and is certified as a B Corp.