Langfuse is an open-source LLM Engineering Platform that helps teams build useful AI applications through tracing, evaluation, and prompt management. Now part of ClickHouse, Langfuse aims to be the 'Datadog' for LLM observability, addressing the challenges of building AI applications in both startups and enterprises. It is the largest open-source solution in its category, trusted by numerous large companies and with significant adoption metrics. The acquisition by ClickHouse in January 2026 was driven by the fundamental data problem inherent in LLM observability, with Langfuse already running on ClickHouse. This partnership allows for faster product development, commitment to open source and self-hosting, and accelerated revenue growth through combined Go-To-Market and sales efforts. Langfuse was previously backed by prominent investors like Y Combinator, Lightspeed, and General Catalyst. The team is small, engineering-heavy, experienced, and based in Berlin and San Francisco. The company is also hiring for engineering roles in EU timezones and requires one week per month in the Berlin office.
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Job Type
Full-time
Career Level
Mid Level
Education Level
No Education Listed