Langfuse is an open-source platform that delivers observability, prompt management, and evaluation tooling for large-language-model (LLM) applications, enabling teams to develop, monitor, and debug AI systems collaboratively. With SDKs for Python and JavaScript/TypeScript, a REST API, and native integrations for OpenAI, Langchain, Llama-Index, and Vercel AI, developers can trace every model call, run automated tests, and iterate on prompts directly in the UI or Playground. Product managers gain real-time insights into cost, latency, and user feedback through the Langfuse dashboard, and can orchestrate human-labeling workflows and security-risk assessments within the same ecosystem. The platform is battle-tested in production by thousands of users—from YC startups to enterprises like Khan Academy and Twilio—and its rapid self-hosting capability and vibrant community on GitHub and Discord set it apart in the AI tooling space.
Open Positions
GTM Engineer
2+ years of experience in technical sales or customer success, proficiency in CRM tools, and strong technical aptitude
Technical Customer Success
Experience in customer success, strong technical aptitude, and excellent communication skills required
(Former) CTO
CTO with experience running teams, shipping code, and low ego about roles and titles
(Senior) Frontend Engineer
3+ years of frontend development experience, experience building performant front-ends, and strong understanding of React, TypeScript, and modern frontend tooling
(Senior) Design Engineer
3+ years of experience in front-end / full-stack engineering, take ownership of frontend and UI/UX, good understanding of best in class UI/UX
(Senior) Backend Engineer
3+ years of experience in backend or full-stack development, CS/quantitative degree, hard worker and thrive working in a small and accountable team
Technical Support Engineer
Solid foundations in software engineering, strong writing skills, and curiosity for LLM application development
Founding DevRel Engineer
Must have technical background, experience in creating content, and taste in good content
(Senior) Product Engineer
PM and project management skills, experience building highly reliable, scaling infrastructure, interest in open source software and talking to users
Technical Sales
2-5 years of experience in technical sales or customer success, proficiency with CRM tools, and strong technical aptitude
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