Langfuse

Product Engineer

Langfuse Berlin

Stellenbeschreibung:

Join to apply for the Product Engineer role at Langfuse

We're looking for an experienced product engineer to ship category defining LLM engineering products.

About Langfuse

  • We are building the fastest growing open-source LLM engineering platform.
  • We help engineers and enterprises build and run LLM applications at scale.
  • We've raised $4m from Y Combinator, Lightspeed and General Catalyst.
  • Thousands of teams and engineers use Langfuse daily. Thousands are joining every month.
  • We're a small, focused team working in-person from Berlin, Germany.

What You'll Do

  • Do whatever it takes to build new features for our users. For this you are not afraid to touch FE, BE, SDKs or Docs
  • You love to communicate with users on a call or in one of our hundreds of slack channels
  • You will come up with a plan on how to build the next big feature at Langfuse and execute on it
  • Doing support
  • Writing docs

Tech Stack

  • Frontend and Backend in Typescript (including Express, NextJs, Tailwind, Prisma, tRPC)
  • Clickhouse, Postgres, Redis, S3
  • Client facing SDKs in Python and Typescript
  • You should be familiar with a majority of these but we trust that you can pick up a new language/framework quickly.

What We're Looking For

  • Someone who is able to PM and project manage themselves
  • Experience building highly reliable, scaling infrastructure
  • Interest in open source software and talking to users
  • Hard worker who thrives in a small, accountable team
  • CS or quantitative degree preferred
  • Impressive achievements (professional or otherwise)

Bonus Points

  • Former founder
  • Experience in SDK design
  • DX, ML/AI background

Why Langfuse?

  • Building for very sophisticated technical users
  • Competitive salary & equity compensation
  • Strong customer & revenue growth
  • You are still joining really early
  • Strong in person engineering culture (Berlin-Mitte)
  • Extreme autonomy
  • Performance and learning focused culture
  • Everyone on the team says: 'best place I've ever worked at'
  • 2 short scheduled meetings per week

Langfuse is an equal opportunities employer and welcomes applications from all qualified candidates.

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Stelleninformationen

  • Typ:

    Vollzeit
  • Arbeitsmodell:

    Vor Ort
  • Kategorie:

  • Erfahrung:

    2+ years
  • Arbeitsverhältnis:

    Angestellt
  • Veröffentlichungsdatum:

    04 Nov 2025
  • Standort:

    Berlin

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