Langfuse

Senior Product Engineer

Langfuse

full-time

Posted on:

Location Type: Hybrid

Location: BerlinGermany

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Salary

💰 €90,000 - €160,000 per year

Job Level

About the role

  • Own features end-to-end: from talking to users, to writing the spec, to shipping the code and docs, to writing the changelog post with your name on it.
  • Work across the full stack: and we mean full. Our surface area is wide: React frontend, Next.js backend, ClickHouse analytics, Python and TypeScript SDKs, public docs, Terraform modules, and more.
  • Talk to users constantly: jump on calls, respond in community channels, and route support requests.
  • Write public documentation about the features you own.
  • Ship publicly during Launch Weeks: we've run four Launch Weeks so far, dropping a new feature every day for a week.
  • You're never alone. Anyone from the team is happy to go into a whiteboard session with you.

Requirements

  • Someone who has built features or even entire products from scratch end-to-end
  • Experience building and shipping user-facing products end-to-end, ideally in TypeScript/React and with exposure to data-intensive backends
  • Someone who can manage projects themselves. You know how to develop strong conviction about what to build and how to ship it.
  • Taste for great developer experience: you care about API design, UI details, and clear documentation
  • Interest in open source software and genuine excitement about talking to developers about their problems
  • Thrives in a small, accountable team where your output is visible and matters
  • CS or quantitative degree preferred.
  • Bonus points: Experience with ClickHouse, analytics databases, or building complex data visualizations
  • Bonus points: Former founder or early startup experience
  • Bonus points: Contributions to popular open source projects
  • Bonus points: ML/AI background or familiarity with the LLM framework ecosystem
Benefits
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Applicant Tracking System Keywords

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Hard Skills & Tools
TypeScriptReactPythonClickHouseTerraformdata visualizationAPI designdocumentation writingproject managementopen source software
Soft Skills
communicationteam collaborationuser engagementconviction in decision makingdeveloper experience focusaccountabilityproblem-solvingadaptabilityinitiativecreativity
Certifications
CS degreequantitative degree