Senior Backend Engineer
LangfuseBerlin, Germany • London, England, United Kingdom • Munich, Bavaria, Germany • Paris, Ile-de-France, France • Zurich, Zurich, Switzerland
Posted February 17, 2026
Full Time
About the Company
Langfuse is an open-source LLM engineering platform that helps teams build useful AI applications.
Job Description
We are looking for a Senior Backend Engineer to own and scale the infrastructure behind the most widely adopted open source LLM engineering platform. The ideal candidate will have experience with database internals, query optimization, and distributed systems, and will be comfortable reading and writing TypeScript and SQL.
Requirements
- Strong backend engineer who gets excited about database internals, query optimization, and distributed systems
- Experience with analytical databases, data pipelines, or high-throughput event processing
- ClickHouse experience is a big plus but not required
- Comfortable reading and writing TypeScript (our backend) and SQL
- Interest in open source software and genuine enjoyment talking to users about their scaling challenges
Benefits
- Competitive salary
- Equity
- Relocation assistance
- Flexible work schedule
- Opportunities for professional growth and development
