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Langfuse

Open source LLM engineering platform

Y Combinator — Backed by Y Combinator
Discussion
aideveloper-toolsenterprise-software
https://langfuse.com ↗ LinkedIn ↗

Company facts

Early-stage
Founded
2023
Employees
19
Headquarters
Germany
CEO
Marc Klingen

About

Traces, evals, prompt management and metrics to debug and improve your LLM application. Onboard via https://langfuse.com Langfuse helps you build and improve LLM applications across the entire lifecycle: - Develop: Observability, Langfuse UI & Prompt Management - Monitor: Traces, Analytics, Metrics & Evaluations - Test: Experiments, Releases & Datasets We are hiring: https://langfuse.com/careers Langfuse was acquired by Clickhouse in January of 2026.

7 jobs
Langfuse Backed by Y Combinator
7 views 2 weeks ago

Senior Software Engineer (SDK)

Open 86d HybridEuropeSenior

Senior engineer owning and building Python/TypeScript SDKs for an open-source LLM observability platform built on OpenTelemetry, with one week per month in Berlin.

AI API Api Design AWS Bedrock ClickHouse +22 skills
90K – 160K €
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Langfuse Backed by Y Combinator
3 weeks ago

Product Marketing Engineer

Open 86d HybridEurope

About Langfuse Open Source LLM Engineering Platform that helps teams build useful AI applications via tracing, evaluation, and prompt management ( mission , product ). We are now part of ClickHouse. We're building…

AI ClickHouse Data Science Datadog Docker +11 skills
 Sign in to see your match
Langfuse Backed by Y Combinator
9 views 2 months ago

Developer Relations Engineer (Events & Community)

Open 86d RemoteEurope, North America
United States

Represents Langfuse at AI/engineering events across Europe and the US, runs demos and workshops, and turns in-person interactions into marketing momentum for this open-source LLM observability platform.

AI ClickHouse Datadog Developer Advocacy Developer Experience +10 skills
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Langfuse Backed by Y Combinator
7 views 2 months ago

Product Marketing Manager

Open 45d HybridEurope

About Langfuse Open Source LLM Engineering Platform that helps teams build useful AI applications via tracing, evaluation, and prompt management ( mission , product ). We are now part of ClickHouse. We're building…

AI ClickHouse Cloud Datadog Docker +10 skills
 Sign in to see your match
Langfuse Backed by Y Combinator
7 views 3 months ago

Senior Cloud Infrastructure Engineer

Open 86d HybridEuropeSenior

About Langfuse Open Source LLM Engineering Platform that helps teams build useful AI applications via tracing, evaluation, and prompt management ( mission , product ). We are now part of ClickHouse. We're building…

AI Automation AWS Backbone.js CI/CD +22 skills
 Sign in to see your match
Langfuse Backed by Y Combinator
7 views 7 months ago

Senior Product Engineer

Open 86d HybridEuropeSenior

About Langfuse Open Source LLM Engineering Platform that helps teams build useful AI applications via tracing, evaluation, and prompt management ( mission , product ). We are now part of ClickHouse. We're building…

AI Analytics API Api Design ClickHouse +18 skills
 Sign in to see your match
Langfuse Backed by Y Combinator
7 views 7 months ago

Senior Backend Engineer (Data Infrastructure)

Open 86d HybridEuropeSenior

About Langfuse Open Source LLM Engineering Platform that helps teams build useful AI applications via tracing, evaluation, and prompt management ( mission , product ). We are now part of ClickHouse. We're building…

AI API ClickHouse Cloud Data Pipelines +14 skills
 Sign in to see your match

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