Senior Product Engineer

Langfuse
Zurich, Munich, Paris, Berlin
Workplace: HybridFull timeEUR 90,000 - 160,000 annuallyFunction: Solutions Engineering & Sales EngineeringSkills: ["Ownership","Communication","Project management","API design","Documentation"]

Own product features end-to-end for an open-source LLM engineering platform—turning user problems into specs, code, docs, and public changelog posts. Work across the full stack (React, Next.js, Express, PostgreSQL, ClickHouse, and more) and collaborate with users via calls and community support. Build with a TypeScript monorepo, contribute to developer-experience-focused SDKs and UI for traces, and help scale data-intensive LLM observability as part of the ClickHouse team.

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FursaFursa
Langfuse
Langfuse
5 months ago

Senior Product Engineer

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Source: Company careers pageValidated by: Fursa AI
Last checked: 8 hours agoStatus: Live

Job Summary

Own product features end-to-end for an open-source LLM engineering platform—turning user problems into specs, code, docs, and public changelog posts. Work across the full stack (React, Next.js, Express, PostgreSQL, ClickHouse, and more) and collaborate with users via calls and community support. Build with a TypeScript monorepo, contribute to developer-experience-focused SDKs and UI for traces, and help scale data-intensive LLM observability as part of the ClickHouse team.
Location: Zurich, Munich, Paris, Berlin
Workplace: Hybrid
Employment Type: Full time
Job Function: Solutions Engineering & Sales Engineering
Seniority: Mid level

Key Responsibilities

  • •Own features end-to-end—from user conversations and specs through shipping code and documentation.
  • •Work across the full stack (frontend, backend, analytics) to deliver whatever the feature requires.
  • •Talk to users constantly via calls and community channels, routing support requests to guide what to build next.
  • •Write public documentation for the features you own (docs are product).
  • •Ship publicly during Launch Weeks and present what you built to the community.

Pay and Benefits

Salary: EUR 90,000 - 160,000 annually
Equity and Bonus:Equity

Key Requirements

  • •Built features or entire products end-to-end from scratch.
  • •Experience shipping user-facing products end-to-end, ideally with TypeScript/React and exposure to data-intensive backends.
  • •Ability to manage projects independently, building conviction about what to build and how to ship.
  • •Strong developer experience taste, including API design, UI details, and clear documentation.
  • •Interest in open source and excitement about talking to developers about their problems.
Experience:Open sourceSaaSLLM
Skills:OwnershipCommunicationProject managementAPI designDocumentation
Licenses:MIT
Tech Stack:TypeScriptNext.jsReactExpressPostgreSQLClickHouseS3RedisTerraformOpenTelemetryDockerMIT

Company Brief

Langfuse
Provides an observability and analytics platform for large language models and AI applications, enabling teams to track, debug, and improve model outputs, prompts, and user interactions across deployments.
Industry: Developer Tools
Company Size: Small (11 to 50 employees)
Growth: Early Stage Startup
Funding: Seed
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