Das ist der Job
We are now part of ClickHouse.
Darum lohnt es sich
About Langfuse
Open Source LLM Engineering Platform that helps teams build useful AI applications via tracing, evaluation, and prompt management (mission, product). We’re a small, engineering‑heavy, and experienced team in Berlin and San Francisco.
In Short
We’re looking for a backend/platform engineer to own and scale the infrastructure behind the most widely adopted open source LLM engineering platform — processing terabytes of AI tracing data per day for thousands of AI teams, including 19 of the Fortune 50.
We’re building the "Datadog" of this category; model capabilities continue to improve, but building useful applications is really hard, both in startups and enterprises. Largest open source solution in this category: trusted by 19 of the Fortune 50, >2k customers, >26M monthly SDK downloads, >6M Docker pulls.
We joined ClickHouse in January 2026 because LLM observability is fundamentally a data problem and Langfuse already ran on ClickHouse. Together we can move faster on product while staying true to open source and self‑hosting, and join forces on GTM and sales to accelerate revenue. Previously backed by Y Combinator, Lightspeed, and General Catalyst.
We are also hiring for engineering in EU time zones and expect one week per month in our Berlin office (how we work). Why Backend Engineering at Langfuse
Your work will have an outsized impact. Langfuse ingests terabytes of AI tracing dat
