Langfuse - Product Engineer, Integrations

• Passionate about the LLM ecosystem. You’ve built real applications with frameworks like LangChain, Pydantic AI, Vercel AI SDK, LlamaIndex, or similar — or you have a deep willingness to go deep and get your hands dirty with every major framework in the space. You’re excited about this ecosystem, not just familiar with it.
• Strong in Python and/or TypeScript. You write clean, reliable code. You don’t need to be a systems-level performance expert, but you care about code quality and understand that integrations run inside other people’s production systems.
• Product-minded engineer. You think about the developer who’s going to use your integration at 11pm trying to ship a feature. You obsess over the getting-started experience: how many lines of code does it take? Is the error message helpful? Does the docs example actually work?
• Self-directed and motivated. You know how to develop conviction about what to build and how to ship it. You don’t wait for detailed specs — you investigate the framework, talk to users, and propose the right approach.
• Excited about open source and developer community. You genuinely enjoy talking to developers about their integration challenges, writing clear documentation, and contributing to open source projects.
• Thrives in a small, accountable team. Your output is visible and matters. You’re comfortable owning outcomes, not just tasks.

CS or quantitative degree preferred, but not required. We care far more about what you’ve built and your hunger to learn.

Bonus Points

• Experience with OpenTelemetry internals or observability instrumentation
• Contributions to popular open source projects, SDKs, or developer tools
• Experience building developer tooling, CLIs, or client libraries
• Former founder or early startup experience
• Active presence in AI/ML developer communities (blog posts, talks, open source)

No candidate checks all boxes. If you feel you are a good fit for this role, please go ahead and apply.

Projects You Could Own

• Build and ship a Langfuse integration for an emerging agent framework (e.g., OpenClaw, new OTEL-based instrumentation)
• Design the integration pattern for a new category of AI tools (e.g., voice agents via LiveKit/Pipecat)
• Create comprehensive quickstart cookbooks that get developers from zero to traced in under 5 minutes
• Work with the OpenTelemetry community to improve GenAI semantic conventions
• Maintain and upgrade our most popular integrations (OpenAI, LangChain, Vercel AI SDK) as those frameworks ship breaking changes