(Senior) Backend Engineer (IAM and Billing)
LangfuseBerlin, Germany • London, England, United Kingdom • Munich, Bavaria, Germany • Paris, Ile-de-France, France • Zurich, Zurich, Switzerland
Posted April 17, 2026
Full Time
About the Company
Langfuse is a leading open-source LLM engineering platform that helps teams build useful AI applications.
Job Description
Langfuse is a leading open-source LLM engineering platform. We're building the "Datadog" of AI applications, and we're looking for a Senior Backend Engineer to lead our IAM and Billing efforts.
Requirements
- Strong backend engineer with experience designing secure, reliable platform systems
- Experience building authentication and authorization systems, including SSO/SAML, OAuth, and RBAC
- Familiarity with billing or payments infrastructure, including usage-based metering and payment provider integrations
- Comfortable reading and writing TypeScript and SQL
Benefits
- Competitive salary and benefits
- Opportunity to work on a high-impact project
- Collaborative and dynamic team environment
- Continuous learning and growth opportunities