Langfuse

Langfuse is building the "Datadog" for LLM engineering, offering an open-source platform for tracing, evaluation, and prompt management. Having joined ClickHouse, we are accelerating our mission to help teams build useful AI applications. Our SDKs are a critical part of the developer experience, downloaded millions of times monthly, and your work will directly shape how developers interact with our platform. This role offers a unique opportunity to gain deep expertise in LLM engineering by working closely with cutting-edge AI applications and ambitious software engineers.

Langfuse, an open-source LLM engineering platform, is seeking a Developer Relations Engineer to focus on events and community engagement. As part of ClickHouse, Langfuse helps teams build AI applications through tracing, evaluation, and prompt management. This role is crucial for driving adoption and momentum through in-person interactions, complementing the product-led, open-source growth strategy. The ideal candidate will own the end-to-end process of representing Langfuse at key industry events, making the product clear to technical audiences, and translating these interactions into lasting marketing impact.

Langfuse is seeking a Senior Cloud Infrastructure Engineer to ensure the reliability, performance, and cost-efficiency of their open-source LLM engineering platform. This role is crucial for maintaining Langfuse Cloud on AWS ECS Fargate and ClickHouse Cloud, as well as supporting self-hosted deployments. The engineer will own the end-to-end observability stack, automate infrastructure processes, and scale the platform to meet growing demand. This is an opportunity to work closely with the ClickHouse team and directly impact a product used by major enterprises.

Langfuse, now part of ClickHouse, is building an open-source LLM engineering platform focused on tracing, evaluation, and prompt management. We aim to be the 'Datadog' for LLM applications, addressing the complexity of building useful AI. Our platform is trusted by numerous Fortune 50 companies and has a significant user base with millions of SDK downloads. Joining ClickHouse allows us to accelerate product development and leverage data expertise. This role offers a unique opportunity to have a significant impact, working on open-source features visible to a large community. Product Engineers at Langfuse own features end-to-end, from understanding user problems to shipping solutions, gaining deep exposure to cutting-edge LLM application development.

Langfuse is building the "Datadog" for LLM engineering platforms, offering tracing, evaluation, and prompt management. As part of ClickHouse, we are scaling our open-source platform to process terabytes of AI tracing data daily for thousands of AI teams, including 19 of the Fortune 50. We are seeking a Senior Backend Engineer to own and scale the infrastructure that powers this data-intensive platform. Your work will directly impact the performance and affordability of Langfuse at scale, optimizing ingestion pipelines, ClickHouse data models, and backend abstractions. You will also ensure Langfuse runs seamlessly across cloud and self-hosted environments, with direct access to the ClickHouse database engineering team.