Langfuse - Senior Backend Engineer

📋 Description

• Own and optimize the ingestion pipeline
• Make ClickHouse fast by designing schemas, optimizing merge strategies, tuning batch inserts
• Build new infrastructure-heavy features such as LLM-as-a-Judge, alerting at scale, client-code
• Test with real data in production by running load tests against production data to validate schema
• Scale for what's next by thinking ahead about what breaks at 10x scale
• Operate Langfuse Cloud across multiple production environments

🎯 Requirements

• Strong backend engineer who gets excited about database internals, query optimization, and
• Gets excited when working with a ton of data
• Experience with analytical databases, data pipelines, or high-throughput event processing
• Self-organizes with strong opinions about what to build and how to ship it
• Comfortable reading and writing TypeScript (backend) and SQL
• Interest in open source software and genuine enjoyment talking to users about their scaling

🎁 Benefits

• Flexible work environment
• Employer contributions towards healthcare
• Equity in the company (stock options)
• Flexible time off in the US, generous entitlement in other countries
• USD$500 Home office setup for remote employees
• Global Gatherings – opportunities for in-person connection at company-wide offsites